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彭桓武理论物理创新研究中心“2025引力波物理研讨会”

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浙江省淳安县“两山高层次人才聚集区”（品湖度假酒店）
Description

受国家自然科学基金理论物理专款“彭桓武理论物理创新研究中心”资助，“2025引力波物理研讨会”将于2025年10月13日至19日（12日报到，20日离会）在浙江省淳安县“两山高层次人才聚集区”召开。本次研讨会将聚焦引力波天文学、引力波宇宙学、引力波与基础物理、引力波数据分析等相关领域，为国内外该领域的专家、青年骨干和年轻学子提供一个交流最新研究进展、自由讨论和合作的平台。热忱欢迎从事相关领域理论研究的专家学者、博士后和研究生参会！

本次研讨会每天上午安排两个大会邀请报告，内容涵盖引力波天文学、引力波宇宙学、引力波与基础物理和引力波数据分析方面的最新进展；10月18日和10月19日下午安排自由提交报告。其他时间由参会学者自由交流和讨论相关研究进展，发展科研合作。

本次会议由中国科学院理论物理研究所主办，中国科学院大学国际理论物理中心(亚太地区)、国科大杭州高等研究院协办。

Sponsored by the "Peng Huanwu Theoretical Physics Innovation Research Center" under the Special Fund for Theoretical Physics of the National Natural Science Foundation of China, the 2025 Gravitational Wave Physics Conference will be held at the Two Mountains High-Level Talents Area (located on the lakeside of the renowned Thousand Island Lake in Hangzhou city, China) from October 13 to 19, 2025 (with registration on October 12 and departure on October 20). This conference will focus on fields related to gravitational wave astronomy, gravitational wave cosmology, gravitational waves and fundamental physics, and gravitational wave data analysis. It aims to provide a platform for experts, young researchers and students in this field at home and abroad to exchange the latest research progress, conduct free discussions and carry out cooperation. Experts, scholars, postdoctoral fellows and graduate students engaged in theoretical research in related fields are warmly welcome to attend!

Each morning of the conference will feature two invited plenary reports, covering the latest advancements in gravitational wave astronomy, gravitational wave cosmology, gravitational waves and fundamental physics, as well as gravitational wave data analysis. On the afternoons of October 18 and October 19, there will be sessions for freely submitted reports. During other times, participating scholars will engage in free exchanges and discussions on relevant research progress to foster scientific research collaborations.

This conference is hosted by the Institute of Theoretical Physics, Chinese Academy of Sciences (ITP-CAS), and co-organized by the International Centre for Theoretical Physics, Asia-Pacific (ICTP-AP) and the Hangzhou Institute for Advanced Study of UCAS (HIAS).

 

会议注册截止日期：2025年9月22日

 

大会邀请报告(Invited Speakers)：

蔡荣根（宁波大学）

曹周键（北京师范大学）

John Ellis (King's College London)

龚云贵（宁波大学）

韩文标（上海天文台）

赖    东（李政道研究所）

刘玉孝（兰州大学）

陆由俊（国家天文台）

Michael Ramsey-Musolf (李政道研究所/University of Massachusetts Amherst)

Mairi Sakellariadou (King's College London)

邵立晶（北京大学）

王建民（中国科学院高能物理研究所）

吴岳良（中国科学院大学国际理论物理中心(亚太地区)/中国科学院理论物理研究所）

杨    桓（清华大学）

于清娟（北京大学）

赵    文（中国科学技术大学）

 

会议顾问（按姓氏拼音排序）：

蔡荣根/Rong-Gen Cai（宁波大学）

吴岳良/Yue-Liang Wu（中国科学院大学国际理论物理中心(亚太地区)/中国科学院理论物理研究所）

 

会议组委会（按姓氏拼音排序）：

耿朝强/Chao-Qiang Geng（国科大杭州高等研究院）

郭怀珂/Huai-Ke Guo（中国科学院大学国际理论物理中心(亚太地区)）

郭宗宽/Zong-Kuan Guo（中国科学院理论物理研究所）

黄庆国/Qing-Guo Huang（中国科学院理论物理研究所）

李    理/Li Li（中国科学院理论物理研究所）

皮    石/Shi Pi（中国科学院理论物理研究所）

王少江/Shao-Jiang Wang（中国科学院理论物理研究所）

周宇峰/Yu-Feng Zhou（中国科学院理论物理研究所）

 

注册费、食宿及交通：

会议注册费：教师每人1500元人民币，博士后和学生每人800元人民币。统一在注册现场扫码支付。

会议统一安排食宿，参会人员住宿、交通费用自理。

本次会议的协议酒店为：

酒店1：淳安县“两山高层次人才聚集区”

地址：淳安县千岛湖镇港口路668号

会议协议价：300元/晚

酒店2：千岛湖品湖度假酒店

地址：淳安县千岛湖镇港口路999号

会议协议价：400元/晚、500元/晚

 

会务联系人：

理论物理研究所：王丽，18601371885，wangli@itp.ac.cn

中国科学院大学国际理论物理中心(亚太地区)：张敏，18710002596，zhang-min@ucas.ac.cn

国科大杭州高等研究院：王健，17326076624，jwang@ucas.ac.cn

 

Participants
  • An Chen
  • Baomin Gu
  • Baoyu Xu
  • Bo-Qiang Lu
  • Bohua Li
  • Changkai Chen
  • Chao Zhang
  • Cheng-Gang Shao
  • Chengjie Fu
  • Chong-Bin Chen
  • Da Huang
  • Dan Zhang
  • Dong Lai
  • Fangzhou Guo
  • Guanhao Sun
  • Hanlin Song
  • Hanwen Hu
  • Hao Wang
  • Hao Yang
  • Hao-Kang Chen
  • Heng-Sen Jiao
  • Hengrui Liang
  • Hongguang Liu
  • hongsheng zhang
  • Huaike Guo
  • Huajie Gong
  • Huan Yang
  • Hyat Huang
  • Jia-Jun Wu
  • Jia-Ning Chen
  • Jia-Qi Wang
  • Jiajun Chen
  • Jian-Feng He
  • Jian-Min Wang
  • Jianan Liu
  • Jie Zhu
  • Jin Qiao
  • Jingqi Lai
  • Jingwei Lian
  • Jonathan Ellis
  • Jun Zhang
  • Junjie Zhao
  • Leda Gao
  • leijian Wang
  • Li Hu
  • Li Wang
  • Libo Xie
  • Ligong Bian
  • Lijing Shao
  • Lixin Xu
  • Liyao Gu
  • Lu zheng
  • Mairi Sakellariadou
  • Meng Xu
  • Michael Ramsey-Musolf
  • Ming-Fei Ji
  • Pan-Pan Wang
  • Puxun Wu
  • Qian Chen
  • Qing-Yang Wang
  • Qingjuan Yu
  • Rong-Gen Cai
  • Rongjia Yang
  • Runmin Yao
  • Shao-qin Wu
  • Shen-Shi Du
  • Shi Pi
  • Shou-Shan Bao
  • Tan Liu
  • Vishnu Rajagopal
  • Wen Zhao
  • Wenbiao Han
  • Xiang-Xi Zeng
  • Xiao Bin Sui
  • Xiao-Mei Kuang
  • Xiaobo Zou
  • Xinlei Zhao
  • Xuefeng Feng
  • Ya Guo
  • Ye-Ling Zhou
  • Yejing Zhan
  • Yi-Xiang Wei
  • Yong Tang
  • Yong Yuan
  • Yu-Sen Zhou
  • Yu-Song Cao
  • Yu-Xiao Liu
  • Yuanjie Li
  • Yun Jiang
  • Yun-Long Zhang
  • Yungui Gong
  • Ze-Cheng Zou
  • Zehua Tian
  • Zhang Jian-dong
  • Zhao Li
  • Zhen-Hong Lyu
  • Zhengwen Liu
  • Zhuan Ning
  • Zi-Han Zhang
  • 一千 陈
  • 丰阁 张
  • 佳一 徐
  • 佳庚 矫
  • 博斌 李
  • 呈珺 方
  • 品 高
  • 哲 虞
  • 大春 强
  • 子超 林
  • 宇诗 郝
  • 寒松 张
  • 岩 刘
  • 思昊 张
  • 才莹 邵
  • 承江 殷
  • 振伟 吕
  • 捷 郑
  • 文帝 郭
  • 昊 李
  • 明辉 杜
  • 星宇 钟
  • 晗宇 姜
  • 景瑞 张
  • 智翔 殷
  • 曹 周键
  • 果 陈
  • 根亮 黎
  • 永锋 黄
  • 浚希 石
  • 烨禛 胡
  • 熹景 王
  • 由俊 陆
  • 秋曦 张
  • 联福 韦
  • 胜 龙
  • 良碧 吴
  • 若岑 吴
  • 迈 乔
  • 铁光 訾
  • 镇豪 杨
  • 雅正 陶
  • 雪纯 张
  • 震 潘
  • 鹏 徐
  • Monday, 13 October
    • 08:45 → 09:00
      Opening (ITP-CAS Deputy Director: Yu-Feng Zhou) "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Yu-Feng Zhou (ITP-CAS)
    • 09:00 → 10:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: You-Jun Lu
      • 09:00
        Testing the General Theory of the Standard Model: A Unified Framework for Particle Physics and Cosmology 1h
        Speaker: Yue-Liang Wu
    • 10:00 → 10:30
      Photo/Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 10:30 → 11:30
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: You-Jun Lu
      • 10:30
        Seeking the Origins of Supermassive Black Holes with Gravitational Waves 1h
        Speaker: John Ellis
        JE_Hangzhou.pdf
    • 11:30 → 14:00
      Lunch "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）

      "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）
    • 14:00 → 15:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Mairi Sakellariadou
    • 15:00 → 15:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 15:30 → 17:30
      Discussion: Gravitational Wave Cosmology "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Mairi Sakellariadou
    • 17:40 → 19:40
      Dinner Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）

      Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）
  • Tuesday, 14 October
    • 09:00 → 10:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Dr Wenbiao Han (SHAO)
      • 09:00
        Evolution of Supermassive Binary Black Holes and their Gravitational-Wave Radiation 1h
        Speaker: Qing-Juan Yu
    • 10:00 → 10:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 10:30 → 11:30
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Dr Wenbiao Han (SHAO)
    • 11:30 → 14:00
      Lunch "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）

      "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）
    • 14:00 → 15:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Prof. Yu-Feng Zhou (ITP-CAS)
      • 14:00
        Data analysis for EMRIs 1h
        Speaker: Dr Wenbiao Han (SHAO)
    • 15:00 → 15:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 15:30 → 17:30
      Discussion: Gravitational Wave Data Analysis "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Yu-Feng Zhou (ITP-CAS)
    • 17:40 → 19:40
      Dinner Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）

      Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）
  • Wednesday, 15 October
    • 09:00 → 10:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Yungui Gong (宁波大学)
      • 09:00
        Satellite black holes around the central supermassive black holes in AGNs 1h

        Observational evidence for satellite black holes in AGNs is reported and gravitational waves are discussed.

        Speaker: Jianmin Wang
    • 10:00 → 10:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 10:30 → 11:30
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Yungui Gong (宁波大学)
      • 10:30
        Polarization Modes of Gravitational Waves 1h

        We establish a unified parameterized framework for analyzing the polarization modes of gravitational waves in some general gravitational theories that satisfy the following conditions: (1) Spacetime is four-dimensional; (2) The theories satisfy the principle of least action; (3) The theories are generally covariant; (4) The action describing a free particle is $\int ds$. We find that the polarization modes of gravitational waves depend on the parameter space in the framework, and a theory may allow for up to all six polarization modes. We also find that the polarization modes of gravitational waves in some general theories have some interesting universal properties.

        Speaker: Yuxiao Liu
    • 11:30 → 14:00
      Lunch "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）

      "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）
    • 14:00 → 17:30
      Discussion: Gravitational Wave and Fundamental Physics "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Yuxiao Liu
    • 17:40 → 19:40
      Dinner Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）

      Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）
  • Thursday, 16 October
    • 09:00 → 10:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Jianmin Wang
      • 09:00
        Probing fundamental physics with extreme mass ratio inspirals 1h

        The discovery of gravitational waves marks a new era in the study of cosmology and gravitational theories. In extreme mass ratio inspirals (EMRIs）, where a small compact object inspirals around a massive black hole over tens of thousands of orbits, the inspiral precisely probes the spacetime geometry and environment surrounding the massive black hole. The gravitational-wave signals emitted by such inspirals can be observed by future space-based gravitational-wave detectors. Therefore, EMRIs can be used to probe the dark matter environment around massive black holes, the properties of the massive black holes themselves, and to test theories of gravity. I focus mainly on using EMRIs to investigate dark matter environment, additional charges carried by black holes and additional fundamental fields.

        Speaker: Prof. Yungui Gong (宁波大学)
    • 10:00 → 10:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 10:30 → 11:30
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Jianmin Wang
      • 10:30
        Machine Learning Techniques for Gravitational Wave data analysis 1h

        随着地面引力波探测器的不断升级和空间引力波探测项目的快速推进，越来越复杂的引力波探测数据为数据分析提出了一系列挑战。机器学习在近年来发展非常迅速，它在复杂数据和大规模数据问题上展现出非凡的能力。本报告将从引力波数据处理所需的波源模板构建和模拟、实测数据分析两个方面介绍我们小组近年来发展的机器学习技术。

        Speaker: Zhoujian Cao
    • 11:30 → 14:00
      Lunch "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）

      "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）
    • 14:00 → 17:30
      Discussion: Gravitational Wave Astronomy "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Zhoujian Cao
    • 17:40 → 19:40
      Dinner Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）

      Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）
  • Friday, 17 October
    • 09:00 → 10:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Shi Pi (Institute of Theoretical Physics, Chinese Academy of Sciences)
      • 09:00
        Decihertz gravitational-wave detection and electromagnetic warnings 1h
        Speaker: Lijing Shao
    • 10:00 → 10:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 10:30 → 11:30
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Shi Pi (Institute of Theoretical Physics, Chinese Academy of Sciences)
      • 10:30
        Extreme mass-ratio inspirals: population and environments 1h

        In this talk, I will discuss recent developments in the science of extreme mass-ratio inspirals (EMRIs), which are one of the main targets of spaceborne gravitational wave detectors. I will review their population models and major astrophysical environmental effects, including accretion disk, stellar neighbours, and dark matter. I will explain why both indirect and direct measurements can be both used to infer properties of the EMRI environments.

        Speaker: Huan Yang
    • 11:30 → 14:00
      Lunch "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）

      "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）
    • 17:40 → 19:40
      Dinner Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）

      Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）
  • Saturday, 18 October
    • 09:00 → 10:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Huaike Guo (University of Chinese Academy of Sciences)
      • 09:00
        Gravitational Waves: the Theorist’s Swiss Knife 1h
        Speaker: Mairi Sakellariadou
    • 10:00 → 10:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 10:30 → 11:30
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Huaike Guo (University of Chinese Academy of Sciences)
      • 10:30
        Primordial Gravitational Waves: The Collider - Theory Interface 1h
        Speaker: Prof. Michael Ramsey-Musolf (TDLI-SJTU)
    • 11:30 → 14:00
      Lunch "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）

      "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）
    • 14:00 → 15:40
      Parallel-1 Lecture Hall, 3rd Floor, Building 7, "Eoc·Economy" Senior Talent Hub（两山高层次人才集聚区-7号楼3层报告中心）

      Lecture Hall, 3rd Floor, Building 7, "Eoc·Economy" Senior Talent Hub（两山高层次人才集聚区-7号楼3层报告中心）
      Convener: Shou-shan Bao (Shandong University)
      • 14:00
        Probing ultralight bosons with binary black holes 20m

        Clouds of ultralight bosons can form around spinning black holes through superradiance. In this talk, we shall discuss the dynamical evolution of such clouds in binary black hole systems. Focusing on comparable mass binaries, we demonstrate that the cloud can resonantly transfer between the two black holes and eventually form a common envelope during the late inspiral phase. We also study the implications on orbital dynamics and the signatures in gravitational waves, which provide a unique probe of the new physics.

        Speaker: Dr Jun Zhang (International Center for Theoretical Physics Asia-Pacific)
      • 14:20
        Detectability of the chiral GWs from audible axions with the LISA-Taiji network 20m

        The chiral gravitational wave background (GWB) can be produced by axion-like fields in the early universe. We perform parameter estimation for two types of chiral GWB with the LISA-Taiji network: axion-dark photon coupling and axion-Nieh-Yan coupling. We estimate the spectral parameters of these two mechanisms induced by axion and determine the normalized model parameters using the Fisher information matrix. For highly chiral GWB signals that we choose to analyze in the mHz band, the normalized model parameters are constrained with a relative error less than 6.7% (dark photon coupling) and 2.2% (Nieh-Yan coupling) at the one-sigma confidence level. The circular polarization parameters are constrained with a relative error around 21% (dark photon coupling) and 6.2% (Nieh-Yan coupling) at the one-sigma confidence level.

        Speaker: Yun-Long Zhang (NAOC(National Astronomical Observatories, CAS))
      • 14:40
        Shedding light on dark matter with gravitational waves: searches in the first part of the fourth observing run of LIGO-Virgo-KAGRA 20m

        Abstract:
        Dark matter could compose ~80% of all matter in the universe, and yet it is completely invisible to us. Despite decades of experiments designed to detect dark matter, and numerous models for potential dark matter particles, no concrete evidence has been put forward to support the existence of beyond standard-model physics. Because of this, it is worth asking whether approaching the detection of dark matter from a different point of view, that is, via gravitational-wave interferometers, could provide some insight into explaining the origin of dark matter. In this talk, I will discuss searches for ultralight particle dark matters. While not designed to search for dark matter, gravitational-wave detectors can robustly probe a variety of dark-matter models simultaneously, without affecting their sensitivity to canonical gravitational-wave sources, and put competitive and sometimes even stronger constraints than those from other experiments designed to search for dark matter.

        Speaker: 迈 乔 (中国科学院大学 国际理论物理中心（亚太地区）)
        LVKO4aDMdetection.pdf
      • 15:00
        Probing spin-2 ultralight dark matter with space-based gravitational wave detectors in the mHz regime 20m

        Spin-2 ultralight dark matter (ULDM) is a viable dark matter candidate and it can be constrained using gravitational wave (GW) observations. In this paper, we investigate the detectability of spin-2 ULDM by space-based GW interferometers. By considering a direct coupling between spin-2 ULDM and ordinary matter, we derive the corresponding response functions and sensitivity curves for various time-delay interferometry channels and calculate the optimal sensitivity curves for future millihertz GW detectors. Our results demonstrate that the space-based detectors can place stringent constraints on the coupling constant of spin-2 ULDM, reaching alpha ~ 10^(-10) around a mass of m ~ 10^(-17) eV, surpassing current limits from ground-based detectors and pulsar timing arrays. Thus, the space-based GW detectors can serve as powerful tools not only for detecting GWs but also for probing fundamental properties of ultralight dark matter.

        Speaker: Jing-Rui Zhang (HIAS-UCAS)
      • 15:20
        Searching for Strange Quark Matter Objects through Gravitational Waves 20m

        It is hypothesised that the true ground state of hadronic matter is strange quark matter. Therefore, strange objects like strange stars, strange dwarfs, and even strange planets may stably exist. However, differentiating strange stars from ordinary neutron stars is very challenging. In this report, I will discuss the aspect of observing strange objects through gravitational waves. By the special properties of strange planets and strange dwarfs, gravitational waves from systems containing these objects may provide unique clues to the existence of strange objects, thus proving the strange quark matter hypothesis.

        Speaker: Ze-Cheng Zou
    • 14:00 → 15:40
      Parallel-2 Multi-Functional Hall (opposite the Main Lecture Hall), 3rd Floor, Building 7 （7号楼3层多功能厅，主会场对面）

      Multi-Functional Hall (opposite the Main Lecture Hall), 3rd Floor, Building 7 （7号楼3层多功能厅，主会场对面）
      Convener: Hongsheng Zhang
      • 14:00
        A treatment to gravitational perturbations and Lorentz-violating effects with Lagrangian analysis 20m

        Since the first direct detection to the gravitational wave (GW), i.e., the event GW150914, it has emerged as a blockbuster during the past decade within the realm of theoretical physics. Specially, it provides us with an unprecedented opportunity in testing theories of gravity that beyond the scope of general relativity (GR), especially in the strong-field regime. One common way for extracting physical information and observables encoded in a theory’s Lagrangian is to execute the gravitational perturbations on it. Unfortunately, due to the sophisticated structure of, e.g., the Lorentz-violating (LV) theory, which predicts multiple horizons that beyond GR and plays an important role in constructing the quantum gravity, many attempts in this area are meeting a great challenge under the traditional treatment. To eliminate this challenge, here we will introduce a novel treatment for this sort of problems, which can be expediently referred as Lagrangian analysis. It can not only reveal the inherent stability of the theory but also lead us to the effective derivation process of the corresponding GWs. Hopefully, several research sub-branches, including the study of modified theories of gravity and their combinations with GW observations, will benefit from the development of this novel treatment to gravitational perturbations. More details will be given in the talk.

        Speaker: Chao Zhang (China University of Petroleum, Beijing)
      • 14:20
        Beyond Symmetry-Reduced Models: Bouncing Cosmology, Regular Black Holes and Gravitational Waves from a Full Theory Perspective 20m

        Current research on quantum gravity inspired bouncing cosmologies and regular black holes, as well as their potential gravitational wave signatures, has largely relied on symmetry-reduced models, such as those assuming spherical symmetry. However, these simplified models may fail to capture essential physical features inherent in the full theory. It is therefore crucial to develop approaches that go beyond symmetry reduction and enable the study of such solutions—including their perturbations—within a complete theoretical framework. In this talk, I will introduce a method for uniquely embedding regular black hole and bouncing cosmological solutions into a two-dimensional dilaton-mimetic gravity model. This model satisfies a Birkhoff theorem, which guarantees the uniqueness of the vacuum solution when the mimetic field is non-dynamical. Furthermore, I will show how this construction can be lifted to a four-dimensional covariant formulation within the framework of extended mimetic gravity. This extension allows us to systematically study the perturbation spectrum in the full 4D theory. Our approach provides a unified and systematic way to explore potential gravitational wave signals associated with regular black holes from a full theory perspective, offering new insights into their physical nature and observable signatures.

        Speaker: Hongguang Liu
      • 14:40
        Bouncing behaviour in non-commutative space-time 20m

        The non-commutative space-time structures, naturally incorporate the minimal length scale, carries the imprints of quantum gravity signals. We show that the kappa-Minkowski space-time, a Lie-algebraic type non-commutative space-time appearing in the low energy limit of loop quantum gravity, avoids the initial singularity in early universe by providing a bounce behaviour.

        Speaker: Vishnu Rajagopal
      • 15:00
        Prospect on constraining string-theory-inspired model from gravitational redshift measurements 20m
        Speaker: Li Hu (Institute of Theoretical Physics, Chinese Academy of Sciences)
      • 15:20
        Numerical computation of electromagnetically sourced nonlinear tails 20m

        Amazingly, recent studies indicate that nonlinear effects are of great significance for modelling black hole ringdown. Transient electromagnetic events in the astrophysical environment are typically high-energetic, potentially responsible for some nonlinearities in ringdown. Motivated by the desire to understand these nonlinearities, we solve the inhomogeneous Bardeen-Press-Teukolsky equation numerically, and find second-order gravitational tails induced by an electromagnetic source. Our results suggest that the second-order tails of curvature perturbations with multipole numbers decay as at fixed spatial position and in retarded-time at null infinity, slower than their linear counterparts, which can play a role in multi-messenger observations.

        Speaker: Zhen-Tao He
        _Beamer__Nonlinear_tails.pdf
    • 15:40 → 16:10
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 16:10 → 17:50
      Parallel-1 Lecture Hall, 3rd Floor, Building 7, "Eoc·Economy" Senior Talent Hub（两山高层次人才集聚区-7号楼3层报告中心）

      Lecture Hall, 3rd Floor, Building 7, "Eoc·Economy" Senior Talent Hub（两山高层次人才集聚区-7号楼3层报告中心）
      Convener: Yun-Long Zhang (NAOC(National Astronomical Observatories, CAS))
      • 16:10
        New Insights into Dark Energy from DESI DR2 with CMB and SNIa 20m

        Analyses by the Dark Energy Spectroscopic Instrument (DESI) collaboration suggest a significant deviation from the ΛCDM model when their baryon acoustic oscillation (BAO) measurements are combined with Planck cosmic microwave background (CMB) data and various Type Ia supernova (SNIa) samples. In this work, we systematically investigate the origin of the deviations from the ΛCDM reported in recent cosmological analyses by combining different CMB datasets, BAO measurements, and DESY5 SNIa samples within the w0waCDM framework. We find that the DESY5 SNIa sample, particularly its low-redshift component (DES-lowz), the Planck CMB data, the lensing measurements of Planck and ACT-DR6, and the DESI-DR2 BAO measurements contribute most significantly to the observed tensions. In contrast, combinations involving DES-SN, WMAP, SPT, and ACT-DR6 remain consistent with ΛCDM within ∼ 1σ. Our results highlight the critical impact of SNIa systematics, CMB data, and the choice of BAO dataset on constraints of dynamical dark energy models. These findings underscore the importance of improved calibration, homogeneity, and cross-validation of observational datasets to robustly assess potential deviations from the standard cosmological model.

        Speaker: Da-Chun Qiang (Henan Academy of Sciences)
      • 16:30
        Measuring the cosmic dipole with golden dark sirens in the era of next-generation ground-based gravitational wave detectors 20m

        The tensions between cosmological parameter measurements from the early-universe and the late-universe datasets offer an exciting opportunity to explore new physics, if not accounted for unknown systematics. Apart from the well-known Hubble tension, a tension up to ∼ 4.9σ in the cosmic dipole has also been reported. While the cosmic dipole is mainly induced by the observer’s kinetic motion, an intrinsic dipole arising from the anisotropy of the universe could also play an import role. Such an intrinsic anisotropy can be a dark energy mimicker that causes the observed accelerating expansion of the universe. As a new and powerful tool, gravitational waves can serve as an independent probe to the cosmic dipole. A useful type of events to achieve this is the “golden dark sirens”, which are near-by well-localized compact binary coalescences whose host galaxies can be identified directly due to precise localization. By forecasting golden dark sirens obtained from 10-year observations using different possible detector networks in the future, we find that the standard LIGO-Virgo-KAGRA detectors are not able to detect a meaningful amount of golden dark sirens, and hence next-generation ground-based detectors are essential to obtain a strong constraint on the cosmic dipole. In particular, we find that a three-detector network consisting of more than one next-generation detectors can yield a constraint on the cosmic dipole at an order of $10^{−3}$ when jointly measured with $H_0$. Moreover, a constraint on the cosmic dipole at an order of $10^{−4}$ can be achieved when fixing $H_0$.

        Speaker: An Chen (International Center for Theoretical Physics (Asia-Pacific), University of Chinese Academy of Sciences)
      • 16:50
        Bright siren without electromagnetic counterpart by LISA-Taiji-TianQin network 20m

        Gravitational waves (GWs) with electromagnetic counterparts (EMc) offer a novel approach to measure the Hubble constant ($H_0$), known as bright sirens, enabling $H_0$ measurements by combining GW-derived distances with EM-derived redshifts. Host galaxy identification is essential for redshift determination but remains challenging due to poor GW sky localization and uncertainties in EMc models. To overcome these limitations, we exploit the ultra-high-precision localization ($\Delta \Omega_s \sim 10^{-4} \, \text{deg}^2$) with a space-based GW detector network (LISA-Taiji-TianQin), which permits unique host identification solely from GW signals. We integrate five massive black hole binary (MBHB) population models and two galaxy number density models to compute the redshift horizon for host galaxy identification and evaluate $H_0$ constraints. We find that (1) The network enhances localization by several orders of magnitude compared to single detectors; (2) The identification horizon reaches $z\sim 1.2$ for specific MBHBs in the most accurate localization case; (3) The population model choice critically impacts the outcomes: the most refined population models yield to independent EMc identification rate of 0.6-1 $\text{yr}^{-1}$ with $H_0$ constraints $< 1\%$ fractional uncertainty, the less refined models lead to the rate $<0.1\text{yr}^{-1}$ and $1-2\%$ uncertainty on $H_0$.

        Speaker: Yejing Zhan
      • 17:10
        Constraining Interacting Dark Energy via Black Hole Superradiance 20m

        We demonstrate that black hole superradiance provides a powerful probe of interacting dark energy models. We investigate two scenarios: one where the dark energy acts as a mediator of ultralight dark matter self-interactions, and another where the dark energy field itself becomes superradiant due to a density-dependent mass enhancement within a dark matter spike surrounding a supermassive black hole. The existence of highly-spinning black holes allows us to place novel constraints on the fundamental coupling strength of these dark sector interactions. Our results establish black hole observations as a new and complementary window into the physics of the dark sector.

        Speaker: Zhen-Hong Lyu (Institute of Theoretical Physics, CAS)
      • 17:30
        Universal gravitational self-force for a point mass orbiting around a compact star 20m

        In this work, we study the gravitational backreaction (i.e., the“self-force”) of a point mass moving around a nonrotating, compact star on a circular orbit. We find that the additional self-force, comparing with the case with a point mass orbiting around a Schwarzschild black hole, can be well characterized by a universal frequency-dependent function multiplied by the (dynamical) tidal deformability of the compact star. This finding provides the foundation for building the waveform model for an extreme mass-ratio inspiral system around a starlike black hole mimicker, which is relevant for testing general relativity and exotic compact objects with space-borne gravitational-wave detectors.

        Speaker: Xuefeng Feng (Shanghai Institute for Mathematics and Interdisciplinary Sciences)
    • 16:10 → 17:50
      Parallel-2 Multi-Functional Hall (opposite the Main Lecture Hall), 3rd Floor, Building 7 （7号楼3层多功能厅，主会场对面）

      Multi-Functional Hall (opposite the Main Lecture Hall), 3rd Floor, Building 7 （7号楼3层多功能厅，主会场对面）
      Convener: Ming-Hui Du
      • 16:10
        Laser Interferometry Experimental System for Lunar-Based Gravitational Wave Detection Applications 20m

        基于月面极高真空、低温、弱月震和低重力等自然洁净环境，本文设计了面向0.1-10Hz低频段和KHz高频段引力波探测应用的、引力波调制微弱激光传输相移的激光干涉测量系统；针对其主要的激光光束散粒噪声、测试质量辐射压噪声和月面振动噪声等，基于数值模拟给出了所设计系统的目标频段引力波探测可达灵敏度评估；并讨论了基于超导悬浮技术实现测试质量辐射压噪声进一步压制的可行性。

        Speaker: Lian-Fu Wei (SWJTU)
      • 16:30
        A noise transfer functions calculation method under dynamic orbital conditions for time-delay interferometry combinations 20m

        Space-borne gravitational wave detectors suppress overwhelming laser phase noise by recombining time-delayed heterodyne beatnote phases via time-delay interferometry (TDI). Simultaneously, TDI reshapes secondary noises in the phase, quantified through frequency-domain transfer functions. The dynamic orbits of the detectors modulate secondary noise by affecting arm length variations, which couples into these transfer functions. We propose using a Fourier series to parameterize arm lengths. This yields an analytical method for calculating noise transfer functions applicable to dynamic configurations for arbitrary TDI combinations. Using this method, we analyze three kinds of TDI combinations. For some TDI combinations, the secondary noise transfer functions remain identical under both static equal-arm and dynamic triangular configuration assumptions. However, for zero-response combinations, the static equal-arm configuration assumption renders their secondary noise transfer functions to zero. Thus, the transfer functions must be defined under dynamic triangular configuration conditions. For the T[X, Y, Z] channel, the secondary noise transfer function under the static equal-arm triangular configuration assumption is 2-3 orders of magnitude lower than under dynamic triangular configuration assumptions. The proposed calculation method better aligns with realistic detector constellations, helps improves instrumental noise estimation accuracy, and reduces data post-processing time.

        Speaker: Xinlei Zhao
      • 16:50
        Tilt-to-length coupling coefficients estimation and noise subtraction using a marginalization likelihood function 20m

        Space-based gravitational wave(GW) detectors aim to measure GWs in the millihertz frequency band. Various noise sources can limit the GW detection sensitivity during the detection process. Tilt-to-length(TTL) noise, arising from the angular and lateral jitter of spacecraft(SC) and movable optical subassembly(MOSA), is one of the primary noise sources remaining after using the time-delay interferometry(TDI) technique to suppress laser frequency noise. In this paper, we derive an analytical expression for the TTL noise power spectral density (PSD) in arbitrary geometric TDI combinations. Moreover, we calculate the signal-to-noise ratio(SNR) of TTL noise to the noise floor(test mass acceleration noise and optical path noise) and find that SNR exceeds 1 in the frequency band of 2 mHz to 1 Hz. Then, we construct a marginal likelihood function to estimate TTL coupling coefficients from the unknown noise floor PSD and unknown GW signals. This approach uses these estimated coefficients to subtract TTL noise. We use a simulation to show that TTL coupling coefficients estimation error is less than 0.1mm/rad for forty-five geometric TDI combinations, and the suppressed TTL noise level is below the noise floor. Finally, a glitch is injected to verify the algorithm's robustness. We compare the estimation accuracy of the marginal likelihood estimation with that of the least squares method. Our work shows that the marginal likelihood estimation effectively subtracts TTL noise and demonstrates stronger robustness in the presence of an unexpected glitch.

        Speaker: Hao-Kang Chen
      • 17:10
        Modeling and prediction of the foreground noise in space-based gravitational wave detections 20m

        The Galactic foreground noise presents a major challenge for space-based gravitational wave detection. Gravitational waves from the vast population of double white dwarfs overlap and interfere, producing an indistinguishable foreground component. This contamination complicates the search for other gravitational wave sources and reduces their signal-to-noise ratios. Since the foreground is essentially composed of numerous quasi-monochromatic signals, we exploit their stability by modeling the waveforms into three orthogonal basis-vector components. In the short term, multiple waveforms with similar frequencies can be coherently represented by these three orthogonal components, which can then be used to predict the subsequent waveform evolution. This approach provides an effective strategy for modeling and mitigating the Galactic foreground noise.

        Speaker: Dr Pin Gao (University of Chinese Academy of Sciences)
      • 17:30
        Variational inference for correlated gravitational wave detector network noise 20m

        Gravitational wave detectors like the Einstein Telescope and LISA generate long multivariate time series, which pose significant challenges in spectral density estimation due to the large number of observations as well as the presence of correlated noise. Addressing both issues is crucial for accurately interpreting the signals detected by these instruments. A variational inference method for spectral density estimation is applied to address correlated noise in gravitational-wave data. It uses a cosine-spline basis to represent the PSD, providing a flexible parametrization. To handle very long time series, the method employs a blocked multivariate Whittle likelihood approximation for stationary time series. Instead of MCMC, a surrogate posterior is optimized via stochastic-gradient variational Bayes and then sampled directly, thereby recasting complex posterior sampling into an optimization problem. The method is demonstrated by analyzing 2000 s of simulated Einstein Telescope noise, which shows its ability to produce accurate spectral density estimates and quantify coherence between time series components. This method is particularly effective in addressing correlated noise, a significant challenge in the analysis of multivariate data from collocated detectors.

        Speaker: Mr Jianan Liu (University of Auckland)
    • 17:50 → 19:50
      Dinner Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）

      Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）
  • Sunday, 19 October
    • 09:00 → 10:00
      Plenary "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
      Convener: Jun Zhang (International Center for Theoretical Physics Asia-Pacific)
      • 09:00
        Gravitational Lensing of Gravitational Waves and its Applications 1h
        Speaker: You-Jun Lu
    • 10:00 → 10:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 10:30 → 11:30
      Discussion "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）

      "Eoc·Economy" Senior Talent Hub Lecture Hall 3rd Floor, Building 7 （“两山”高层次人才集聚区 7号楼3层报告中心）
    • 11:30 → 14:00
      Lunch "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）

      "Eoc·Economy" Senior Talent Hub Logistics Center, 1st Floor, Building 2 （“两山”高层次人才聚集区 2号楼1层，后勤中心）
    • 14:00 → 16:00
      Parallel-1 Lecture Hall, 3rd Floor, Building 7, "Eoc·Economy" Senior Talent Hub（两山高层次人才集聚区-7号楼3层报告中心）

      Lecture Hall, 3rd Floor, Building 7, "Eoc·Economy" Senior Talent Hub（两山高层次人才集聚区-7号楼3层报告中心）
      Convener: Da Huang (National Astronomical Observatories, Chinese Academy of Sciences)
      • 14:00
        Testing GUT phase transition via inflated gravitational waves 20m
        Speaker: Ye-Ling Zhou (HIAS-UCAS)
      • 14:20
        Phase Transition Gravitational Waves as a Unique Discriminant for Warm Inflation 20m

        We investigate the properties of gravitational waves generated by heating-induced phase transitions in warm inflation. In this scenario, the heating phase of inflation followed by subsequent cosmological cooling can trigger two associated first-order phase transitions and generate characteristic gravitational waves. The correlated gravitational wave spectral features—amplitude, peak frequencies, and oscillatory behavior—originate from a unified model governing both phase transitions. These signatures allow discrimination between warm and cold inflation models, and give constraint on the key parameters including the dissipative coupling strength and the inflationary energy scale, collectively illuminating early-Universe dissipative dynamics. Future gravitational wave observatories such as BBO, Ultimate-DECIGO, $\mu$Ares, resonant cavities, and Pulsar Timing Array experiments, will play a important role in testing these theoretical
        predictions.

        Speaker: Xiao-Bin Sui
      • 14:40
        Enhancement of first-order phase transitions through a mass-acquiring scalar field 20m

        Phase transitions in the early Universe give rise to effective masses for massless fields in the symmetry-broken phase. We use the lattice simulations to investigate the impact of a spectator scalar field with mass generation on the dynamics of first-order phase transitions and the generation of gravitational waves. In addition to the well-known friction effects, we identify a novel effect that significantly enhances the strength of first-order phase transitions. The amplitude of the mass-acquiring field is highly suppressed in the true vacuum bubbles, resulting in additional release of vacuum energy that concentrate on the bubble walls. We also establish an analytical method to explain our numerical results.

        Speaker: Mr Yuanjie Li (University of Chinese Academy of Science)
      • 15:00
        Acoustic gravitational waves from primordial curvature perturbations 20m

        Primordial curvature perturbations seed both primordial black holes (PBHs) and scalar-induced gravitational waves (SIGWs). However, the standard second-order perturbative calculation of SIGWs omit important nonlinear effect. Once these perturbations re-enter the horizon, their gravitational collapse and subsequent nonlinear hydrodynamic evolution excite strong sound waves in the primordial plasma. Collisions among these sound waves constitute a distinct and additional source of gravitational waves. Here we employ the Misner-Sharp formalism to derive the initial fluid profiles of a single sound wave produced by the gravitational collapse of an overdensity. Building on these profiles, we adapt the sound shell model and perform three-dimensional lattice simulations to compute the gravitational-wave signal produced by an ensemble of such sound waves. These acoustic gravitational waves are complementary to conventional SIGWs and offer a new observational target for future gravitational-wave detectors.

        Speaker: Zhuan Ning (HIAS and ITP-CAS)
      • 15:20
        Scalar-induced gravitational waves with non-Gaussianity up to all orders 20m

        Scalar-induced gravitational waves (SIGWs) are ubiquitous in many early-Universe processes accompanied by non-Gaussianity; hence, precise calculations of SIGWs involve a full understanding of non-Gaussianity. In this Letter, we propose to use the lattice simulations to directly calculate the energy density spectra of SIGWs with non-Gaussianity up to all orders. Our proposal has been first verified to match the existing semi-analytical results with non-Gaussianity, and then applied to more general cases, including high-order primordial non-Gaussianities, the logarithmic dependence in curvature perturbations, the curvaton model, and the ultra slow-roll model. We find that even a modest non-Gaussianity can significantly alter ultraviolet behaviors in SIGW spectra, necessitating special cautions in future detections as well as mutual constraints on/from primordial black holes.

        Speaker: Xiang-Xi Zeng (ITP, CAS)
      • 15:40
        Strong backreaction of gauge quanta produced during inflation and the sourced GWs 20m

        In this report, I will introduce our recent studies about the axion-gauge system during inflation, mainly focusing on the strong backreaction region. With a linear axion potential, we found that a steeper slope can enhance the gauge quanta production, while a larger coupling cannot increase it. We then apply this result to a realistic model with cosine axion potential, finding the quantum fluctuation can limit the max GW spectrum.

        Speaker: Jian-Feng He (ITP, CAS)
    • 14:00 → 16:00
      Parallel-2 Multi-Functional Hall (opposite the Main Lecture Hall), 3rd Floor, Building 7 (7号楼3层多功能厅，主会场对面）

      Multi-Functional Hall (opposite the Main Lecture Hall), 3rd Floor, Building 7 (7号楼3层多功能厅，主会场对面）
      Convener: Zhen Pan
      • 14:00
        AI-Driven Modeling and Inference in Gravitational Wave Astronomy 20m

        The growing capabilities of ground- and space-based GW detectors demand advanced tools for signal detection, waveform modeling, and parameter estimation. AI, particularly deep learning, offers powerful solutions. Physics-Informed Neural Networks (PINNs) embed physical laws into neural networks for consistent waveform generation and inverse modeling without large datasets. Normalizing Flows enable fast, flexible Bayesian inference of complex posteriors. This report highlights recent progress in applying these methods to GW science, emphasizing their role in real-time modeling and inference—paving the way for AI-driven, multi-messenger astrophysics.

        Speaker: 振伟 吕 (大连理工大学)
      • 14:20
        Quantum Search for Gravitational Wave of Massive Black Hole Binaries 20m

        Matched filtering is a common method for detecting gravitational waves. However, the computational costs of searching large template banks limit the efficiency of classical algorithms when searching for massive black hole binary (MBHB) systems. In this work, a quantum matched filtering algorithm based on Grover's algorithm is applied to the MBHB signals. It is demonstrated that the quantum approach can reduce the computational complexity from $O(N)$ to $O(\sqrt{N})$ theoretically, where $N$ is the size of the template bank. Simulated results indicate that the quantum-enhanced approach significantly reduces computational costs. However, it is also found that the performance can degrade in some cases due to instability of the algorithm. This highlights the need for more robust and stable quantum search strategies. This paper is accepted by PRD.

        Speaker: Fangzhou Guo (Hangzhou Institute for Advanced Study, UCAS;)
      • 14:40
        Enhanced detectability of gravitationally lensed gravitational waves by spinless black holes with aLIGO 20m
        Speaker: Cheng-Jiang Yin
      • 15:00
        Hierarchical search EMRI signals via matched filtering 20m

        The GW of EMRIs can signal many new physics so its data analysis is an important task for space borne GW mission. However its high dimensional and wide prior parameter space, needle-in-haystack signal morphology, as well as the characteristics of multiple harmonics superposition hinder the development of its data analysis, especially computational intensive matched filtering. In this report, we will introduce our reduced dimensionality likelihoods, particle swarm optimizer, and progress of the hierarchical search strategy to overcome the aforementioned challenges, and compare the performace with the latest related works from LISA.

        Speaker: xiaobo zou (HIAS,UCAS)
      • 15:20
        Second-order self-force for eccentric EMRIs in Schwarzschild spacetime 20m

        The second order self-force (2SF) effect should be considered in the waveform modelling Extreme Mass Ratio Inspirals (EMRIs). Up to now, the waveform of EMRI including the 2SF effect is only achieved for the circular orbit on Schwarzschild background. In this work, we generalized the calculation of the 2SF to the eccentric orbits on Schwarzschild spacetime. We calculated the puncture field, and give the form of two timescale expansion for the equations of motion.

        Speaker: Yi-Xiang Wei
      • 15:40
        One-loop corrections to infrared GWs is forbidden by symmetries 20m

        We directly proved the absence of one-loop corrections on large
        scales starting from the symmetry of the system - without the need for specific loop diagram calculations.

        Speaker: Cheng-Jun Fang
    • 16:00 → 16:30
      Break Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）

      Multi-Functional Hall & Corridor outside the main lecture hall （多功能厅及主会场外走廊）
    • 16:30 → 17:50
      Parallel-1 Lecture Hall, 3rd Floor, Building 7, "Eoc·Economy" Senior Talent Hub（两山高层次人才集聚区-7号楼3层报告中心）

      Lecture Hall, 3rd Floor, Building 7, "Eoc·Economy" Senior Talent Hub（两山高层次人才集聚区-7号楼3层报告中心）
      Convener: Ye-Ling Zhou (HIAS-UCAS)
      • 16:30
        Wave-optics gravitational lensing and black hole scattering 20m
        Speaker: Zhao Li (Peking University)
      • 16:50
        Ringdown Signals: Data Gaps, Joint Observations, and Theoretical Outlook 20m

        The ringdown phase is one of the most informative stages of gravitational-wave observations, encoding the spacetime properties of the remnant black hole and clues to its formation. Upcoming space-based detectors are expected to greatly increase the number of detectable ringdown events. However, unavoidable data gaps in space missions can substantially affect these short-lived signals. In this talk, we quantify the impact of data gaps on ringdown detection and parameter estimation, and assess how joint observations can mitigate these effects. We conclude with a concise review of recent progress on ringdown studies and an outlook for theory and observation.

        Speaker: Junxi Shi
      • 17:10
        A Deep-Learning Framework for Reconstructing Ringdown Signals with Data Gaps 20m

        We introduce DenoiseGapFiller (DGF), a deep-learning framework specifically designed to reconstruct gravitational-wave ringdown signals corrupted by data gaps and instrumental noise. DGF employs a dual-branch encoder–decoder architecture: one branch ingests Q-transform time–frequency representations to capture narrow-band quasi-normal mode ridges in time-frequency representation, while the parallel branch uses multi-resolution wavelet embeddings to encode broader temporal context; these are fused via temporal mixing layers and Transformer-style attention. Trained end-to-end on synthetic ringdown waveforms with gaps up to 20% of the segment length and network signal-to-noise ratio(SNR) spanning 1–10, DGF achieves mean waveform mismatches of 0.023 in the low-SNR (1–5) regime and 0.002 in the
        high-SNR (5–10) regime. Time-domain residual amplitudes shrink by roughly an order of magnitude, and power spectral density in the 0.01–1 Hz band is suppressed by 1–2 orders of magnitude, restoring the QNM peak around 0.01-0.1 Hz. Phase deviation analysis yields mean peak-phase deviations of -0.47° and -3.71° for low-SNR, with high-SNR case of -0.01° and 0.90°. These results demonstrate that a well designed convolutional time-mixing network can infer damped oscillatory structures directly from limited, corrupted observations, making DGF a promising preprocessing module for precision black hole spectroscopy in next‐generation gravitational wave detectors.

        Speaker: Jingqi Lai
    • 16:30 → 17:50
      Parallel-2 Multi-Functional Hall (opposite the Main Lecture Hall), 3rd Floor, Building 7 （7号楼3层多功能厅，主会场对面）

      Multi-Functional Hall (opposite the Main Lecture Hall), 3rd Floor, Building 7 （7号楼3层多功能厅，主会场对面）
      Convener: Hongguang Liu
      • 16:30
        Quantum effect skins a charged black hole 20m

        We prove that quantum effects, Hawking effect together with Shwinger effect inevitably lead to violation of cosmic censorship.

        Speaker: Hongsheng Zhang
      • 16:50
        f(T) thick brane and QNMs 20m

        Curvature, torsion and non-metricity are geometric trinity. F(T) theory modifies the metric teleparallel gravity. We constructed a thick brane model in f(T) theory. Tensor perturbations are analyzed and the localization of graviton zero mode is studied. Besides, we also studied the quasinormal modes of f(T) thick brane and gravitational echos can also be found.

        Speaker: Wendi Guo
      • 17:10
        Multipole measurements through gravitational waves of compact object binaries 20m

        The inaccessibility of a black hole’s internal structure, due to the one-way nature of the event horizon, remains a fundamental challenge in astrophysics. Nevertheless, gravitational interactions can bridge our understanding between the black hole’s internal structure and the external spacetime. Specifically, the spacetime structure is characterized by its multipole moments, which vary distinctly among different black holes. According to general relativity, black holes exhibit the no-hair property, uniquely defining their multipole moments. Gravitational waves (GWs) serve as carriers of this multipole-moment information from the spacetime of black holes. In this study, we analyze mock samples of binary black holes calibrated to the GWTC-3 catalog to investigate the measurement and associated degeneracies of their multipole moments using individual and joint observations from next-generation ground-based and space-based detectors. Our results show that measuring higher-order multipole moments, such as the octupole, remains challenging for individual detectors due to strong parameter degeneracies. However, multiband joint observations mitigate these degeneracies, improving the precision of multipole parameter estimation by approximately an order of magnitude. This advancement underscores the critical role of multiband gravitational-wave networks in probing black-hole spacetime properties and testing the no-hair theorem.

        Speaker: Jiageng Jiao (University of Chinese Academy of Sciences)
    • 17:50 → 19:50
      Dinner Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）

      Qiandaohu PIN-LAKE Resort Hotel Pinxiu Hall, F Floor （千岛湖品湖度假酒店 F层，品秀厅）
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