[astroseminar at Sapienza] Gravity theory webinar: Wednesday July 28th @4pm: Francesco Di Filippo (Yukawa Institute) - On the assumptions leading to the information loss paradox

[Paolo Pani]

Last gravity-theory webinar before the summer break:

Speaker: *Francesco Di Filippo (Yukawa Institute, JP)*
Title: *On the assumptions leading to the information loss paradox*
Date: *Wednesday, July 28th @ 4pm CEST*

Abstract:
*The information loss paradox is usually stated as an incompatibility
between general relativity and quantum mechanics. However, the assumptions
leading to the problem are often overlooked and, in fact, a careful
inspection of the main hypothesises suggests a radical reformulation of the
problem. Indeed, I will present a thought experiment that shows the
existence of an incompatibility between (i) the validity of the laws of
general relativity to describe infalling matter far from the Planckian
regime, and (ii) the so-called central dogma which states that as seen from
an outside observer a black hole behaves like a quantum system whose number
of degrees of freedom is proportional to the horizon area. We critically
revise the standard arguments in support of the central dogma, and argue
that they cannot hold true unless some new physics is invoked even before
reaching Planck scales. This leads to the counterintuitive result that the
information loss problem, in its current formulation, is not necessarily
related to any loss of information or lack of unitarity. Semiclassical
general relativity and quantum mechanics can be perfectly compatible before
reaching the final stage of the black hole evaporation where, instead, a
consistent theory of quantum gravity is needed to make any prediction.*


Zoom link:
https://uniroma1.zoom.us/j/81283707469?pwd=SzkyMk5jRm0xcEN3WE5MYVh1RVFtQT09
ID meeting: 812 8370 7469
Passcode: 915450

Cheers,
Paolo

-- 
Paolo Pani
Associate Professor
ERC StG Fellow, DarkGRA project
Junior Fellow, Scuola Superiore di Studi Avanzati Sapienza

Physics Department (Marconi Building), 3rd floor, room 334
Sapienza University of Rome
Piazzale Aldo Moro 5 - 00185 Rome (Italy)
+39 06 4991 4472 (int 24472)

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