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SUMMARY:A loop quantum gravity inspired effective action in spherically sy
 mmetric background and its applications
DTSTART;VALUE=DATE-TIME:20261107T073000Z
DTEND;VALUE=DATE-TIME:20261107T080000Z
DTSTAMP;VALUE=DATE-TIME:20261023T111323Z
UID:indico-contribution-2939@indico.itp.ac.cn
DESCRIPTION:Speakers: hongwei Tan (Hunan Institute of Technology)\nDevelop
 ing covariant effective descriptions of quantum-corrected black holes is a
 n important challenge in loop quantum gravity (LQG). In this talk\, I will
  present an LQG-inspired effective action in spherical symmetry that admit
 s the quantum Oppenheimer–Snyder (q-OS) black hole as a vacuum solution.
  Starting from a two-dimensional dilaton gravity framework obtained by int
 egrating out the angular degrees of freedom\, the construction introduces 
 an auxiliary constraint sector that promotes the mass parameter to a space
 time scalar and enforces its constancy on shell\, without introducing loca
 l propagating degrees of freedom. Using the covariant phase space formalis
 m\, I will discuss the associated Hamiltonian charges and black hole therm
 odynamics. The Wald entropy contains the classical area term together with
  a logarithmic correction\, while the auxiliary sector contributes a bound
 ary term essential for a consistent first law. I will then present a gener
 alized Birkhoff theorem showing that the vacuum sector admits a two-parame
 ter family of locally static solutions. The additional integration constan
 t is not fixed by asymptotic flatness\, and setting it to zero selects the
  q-OS branch. Its variation raises an integrability issue for the thermody
 namic phase space. These results provide a covariant framework for investi
 gating quantum-corrected black hole dynamics\, entropy\, and the physical 
 conditions required to select particular vacuum solutions.\n\nhttps://indi
 co.itp.ac.cn/event/417/contributions/2939/
LOCATION:
URL:https://indico.itp.ac.cn/event/417/contributions/2939/
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