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SUMMARY:Semiclassical gravity and evaporation of dynamical black holes sou
rced by the quantum trace anomaly
DTSTART;VALUE=DATE-TIME:20210526T090000Z
DTEND;VALUE=DATE-TIME:20210526T100000Z
DTSTAMP;VALUE=DATE-TIME:20210615T150756Z
UID:indico-event-26823@agenda.infn.it
DESCRIPTION:A first approximation to describe the interplay between quantu
m matter and gravity is given by the quantum field on curved spacetimes an
d the semiclassical gravity\, in which the backreaction of a quantum matte
r field propagating over a fixed spacetime geometry can be analyzed by usi
ng the so-called semiclassical Einstein equation. In this framework\, the
evaporation of four-dimensional spherically symmetric black holes can be e
xplained by the appearance of an ingoing negative energy flux at the appar
ent horizon\, which induces a negative variation of the black hole mass. I
will show that this flux can be sourced by the trace anomaly of the quant
um stress-energy tensor in case of a massless conformally-coupled scalar f
ield once a certain averaged energy condition is assumed outside the horiz
on. As an example\, I will compute the negative flux and the rate of evapo
ration in the Vaidya spacetime\, which describes the exterior geometry of
a null radiating star.\n\nPer partecipare: collegarsi al meeting Zoom\n\nT
opic: Theory and Pheno seminars\nhttps://infn-it.zoom.us/j/8573185271\nMee
ting ID: 857 318 5271\n\nhttps://agenda.infn.it/event/26823/
LOCATION:online
URL:https://agenda.infn.it/event/26823/
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