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SUMMARY:Quantum Treatment of Black Hole Superradiance
DTSTART;VALUE=DATE-TIME:20260522T065000Z
DTEND;VALUE=DATE-TIME:20260522T072000Z
DTSTAMP;VALUE=DATE-TIME:20260530T170856Z
UID:indico-contribution-2468@indico.itp.ac.cn
DESCRIPTION:Speakers: Huiyu Zhu (Institute for Basic Science)\nRotating bl
 ack holes can form dense boson clouds through superradiant instability\, m
 aking Kerr black holes a powerful probe of ultralight massive bosons. Prev
 ious studies of black hole superradiance have often treated bosonic fields
  classically\, leaving open questions about how particles are produced and
  how the clouds grow over time. In this work\, we canonically quantize a m
 assive scalar field around a Kerr black hole\, providing a fully quantum d
 escription of black hole superradiance. We show that the evolution of the 
 particle number in the cloud\, as well as the energy and angular momentum 
 of the scalar field\, can be consistently explained within the standard fr
 amework of quantum field theory in curved spacetime. Furthermore\, we prov
 e that the growth of the cloud occurs independently of the choice of initi
 al state. We also explore several phenomena related to a massive scalar fi
 eld in a rotating black hole spacetime\, including Hawking radiation\, adi
 abatic backreaction on the black hole spin\, and the direction of level tr
 ansitions in the presence of self-interactions of the field. Our analysis 
 provides a consistent quantum-mechanical perspective that includes all the
 se phenomena.\n\nhttps://indico.itp.ac.cn/event/419/contributions/2468/
LOCATION:Small Lecture Hall\, Chongqing University Library (图书馆小
 报告厅) 1F-9
URL:https://indico.itp.ac.cn/event/419/contributions/2468/
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