The 3rd International Workshop on Gravitational Waves and the Early Universe (GWEU25)

1 Sep 2025, 09:00 → 6 Sep 2025, 17:00 Asia/Shanghai

TBA (Ningbo, China)

Shi Pi (Institute of Theoretical Physics, Chinese Academy of Sciences)

With the first detection of gravitational waves from binary black hole mergers, we have officially entered the era of gravitational wave cosmology. In the early universe, many processes beyond the Standard Model could generate gravitational waves across a wide frequency range, offering a new observational window into the origin and evolution of the universe. A series of upcoming experiments—including CMB-S4, LiteBIRD, BICEP/Keck, AliCPT, NANOGrav, EPTA, PPTA, CPTA, LISA, Taiji, TianQin, and ET—aim to probe these gravitational waves using CMB polarization, pulsar timing arrays, and interferometers, both space-based and ground-based.

To promote research in this exciting direction, we launched the International Workshop on Gravitational Waves and the Early Universe, aiming to explore how gravitational waves can serve as a novel observational probe of the early universe and new physics, discuss new theoretical predictions for next-generation experiments, and foster interdisciplinary connections. The first two workshops, held in 2023 and 2024, attracted over 100 researchers from around the world and received enthusiastic responses from the academic community.

We are pleased to announce that the 3rd workshop will be held in Ningbo, China, from September 1st to September 6th, 2025. Confirmed invited speakers include the following (with more to be announced):

Rong-Gen Cai (Ningbo University/ITP)

Elisa Ferreira (Kavli IPMU)

Jaume Garriga* (Universitat de Barcelona)

Juan Garcia-Bellido (Institute for Theoretical Physics (IFT UAM-CSIC) in Madrid)

Cristiano Germani (University of Barcelona)

Jinn-Ouk Gong (Ewha Woman's University)

Alexey Koshelev (Shanghai Institute of Technology)

Viatcheslav Mukhanov (Ludwig-Maximilians-Universität München)

Shinji Mokohyama (Yukawa Institute of Theoretical Physics)

Sebastien Renaux-Petel (Institut Astrophysique de Paris)

Misao Sasaki* (APCTP/Kavli IPMU)

Teruaki Suyama (Institute of Science Tokyo)

Alexander Vikman (Central European Institute for Cosmology and Fundamental Physics)

Takahiro Tanaka (Kyoto University)

Yue-Liang Wu* (UCAS/ICTP-AP)

Masahide Yamaguchi (Institute of Basic Science)

(*TBD)

Schedule: Register on Auguest 31st (Sun). Workshop from September 1st (Mon) to 5th (Fri). Free discussion on 6th, and leave on September 7th (Sun).

Venue: Ningbo, China.

This workshop is co-organized by Ningbo University, ITP-CAS, and Center for High Energy Physics, Peking University.

Organizers:

Rong-Gen Cai, Bin Chen, Diego Cruces, Yungui Gong, Cristian Joana, Shi Pi

Contact:

Lü Lü (email: lvlv@pku.edu.cn), Qingrong Ni (email: niqr@itp.ac.cn), Shi Pi (email: shi.pi@itp.ac.cn, phone: +86-13810683773)

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随着LIGO首次探测到双黑洞并合引力波，人类正式进入了引力波宇宙学的时代。在早期宇宙中，许多超出标准模型的新物理过程都可能产生覆盖广泛频率范围的引力波，为我们研究宇宙的起源与演化提供了全新的观测窗口。未来，一系列前沿实验计划将针对这些引力波展开探测，包括利用宇宙微波背景极化的CMB-S4、LiteBIRD、BICEP/Keck和AliCPT，利用脉冲星计时阵列的NANOGrav、EPTA、PPTA和CPTA，以及基于空间和地面干涉仪的LISA、太极、天琴和ET等项目。

为了推动该领域的进一步发展，我们发起了“引力波与早期宇宙国际研讨会”，旨在探讨如何利用引力波这一新型观测手段研究早期宇宙和新物理，讨论下一代引力波实验的新理论预言，并促进相关交叉领域的交流与合作。2023年和2024年，前两届研讨会成功举办，吸引了来自全球百余位学者，并在学术界产生了积极反响。

我们很高兴地宣布，第三届研讨会将于2025年9月1日至9月6日在中国宁波举行。已初步确认的邀请的报告人包括（更多专家确认中）：

Rong-Gen Cai (Ningbo University/ITP)

Elisa Ferreira (Kavli IPMU)

Jaume Garriga* (Universitat de Barcelona)

Juan Garcia-Bellido (Institute for Theoretical Physics (IFT UAM-CSIC) in Madrid)

Cristiano Germani (University of Barcelona)

Jinn-Ouk Gong (Ewha Woman's University)

Alexey Koshelev (Shanghai Institute of Technology)

Viatcheslav Mukhanov (Ludwig-Maximilians-Universität München)

Shinji Mokohyama (Yukawa Institute of Theoretical Physics)

Sebastien Renaux-Petel (Institut Astrophysique de Paris)

Misao Sasaki* (APCTP/Kavli IPMU)

Teruaki Suyama (Institute of Science Tokyo)

Alexander Vikman (Central European Institute for Cosmology and Fundamental Physics)

Takahiro Tanaka (Kyoto University)

Yue-Liang Wu* (UCAS/ICTP-AP)

Masahide Yamaguchi (Institute of Basic Science)

(*待确认)

本次会议不收注册费，食宿自理。2025年8月31日（周日）报到，9月1日（周一）及9月5日（周五）五天会议，9月6日（周六）自由讨论，9月7日（周日）离会。

会议地点：宁波

本次会议由宁波大学基础物理与量子科技研究院、中国科学院理论物理研究所、北京大学高能物理研究中心联合举办，宁波大学基础物理与量子科技研究院承办。并受到科技部国家重点研发计划“引力波探测”专项项目“宇宙弦等新颖引力波源与随机引力波背景的特征和信号识别研究”(项目号2021YFC2203004)的资助。

组织者：

蔡荣根、陈斌、Diego Cruces、龚云贵、Cristian Joana、皮石

会务联系人：

吕律 (lvlv@pku.edu.cn)、倪清容(niqr@itp.ac.cn)、皮石(shi.pi@itp.ac.cn)

会议联系人：

皮石 (邮箱：shi.pi@itp.ac.cn，电话：13810683773，微信：stonepi)