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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:20210615T164800Z
UID:indico-event-26823@agenda.infn.it
DESCRIPTION:Speakers: Paolo Meda (Universita' di Genova Dip.to di Fisica e
INFN)\nA first approximation to describe the interplay between quantum ma
tter and gravity is given by the quantum field on curved spacetimes and th
e semiclassical gravity\, in which the backreaction of a quantum matter fi
eld propagating over a fixed spacetime geometry can be analyzed by using t
he so-called semiclassical Einstein equation. In this framework\, the evap
oration of four-dimensional spherically symmetric black holes can be expla
ined by the appearance of an ingoing negative energy flux at the apparent
horizon\, which induces a negative variation of the black hole mass. I wil
l show that this flux can be sourced by the trace anomaly of the quantum s
tress-energy tensor in case of a massless conformally-coupled scalar field
once a certain averaged energy condition is assumed outside the horizon.
As an example\, I will compute the negative flux and the rate of evaporati
on in the Vaidya spacetime\, which describes the exterior geometry of a nu
ll radiating star.\n\nPer partecipare: collegarsi al meeting Zoom\n\nTopic
: Theory and Pheno seminars\nhttps://infn-it.zoom.us/j/8573185271\nMeeting
ID: 857 318 5271\nhttps://agenda.infn.it/event/26823/
LOCATION:online
URL:https://agenda.infn.it/event/26823/
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SUMMARY:Quantum simulations and computations for Lattice Gauge Theories
DTSTART;VALUE=DATE-TIME:20210623T090000Z
DTEND;VALUE=DATE-TIME:20210623T100000Z
DTSTAMP;VALUE=DATE-TIME:20210615T164800Z
UID:indico-event-27364@agenda.infn.it
DESCRIPTION:Speakers: Elisa Ercolessi (BO)\nQuantum technologies offer a p
latform for analogue simulations and digital quantum computations of Latti
ce Gauge Theories within a Hamiltonian approach.\nWe will discuss the theo
retical framework necessary to approximate the continuous theory\, giving
some examples of both abelian and non-abelian discrete models.\nWe will di
scuss how this approach allows also for the study of non-perturbative effe
cts and real-time dynamics.\n\nPer partecipare: collegarsi al meeting Zoom
\nTopic: Theory and Pheno seminars\nhttps://infn-it.zoom.us/j/8573185271\n
Meeting ID: 857 318 5271\nhttps://agenda.infn.it/event/27364/
LOCATION:online
URL:https://agenda.infn.it/event/27364/
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