High Energy Physics Seminar next week (Carneiro da Cunha)

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_**__*


*Thursday, 1 August* 2024, at *16:00* - *Luigi Stasi Seminar Room **- 
https://indico.ictp.it/event/10769/*
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Bruno Geraldo Carneiro da Cunha (Universidade Federal de Pernambuco)


*“Geometrical Phases in Massive Perturbations of Kerr Black Holes "*

_Abstract_
Linear perturbations of black hole backgrounds are relevant to a number 
of applications, from the ringdown phase of merger events to stability 
and AdS/CFT. The usual method to study the spectrum of these 
quasi-normal modes breaks down near the interesting extremal case. This 
hindrance was overcome recently by exploring the analogy between the 
differential equations that describe the perturbations and conformal 
blocks in conformal field theories. We use the analogy to explore scalar 
massive perturbations of the Kerr black hole near extremality, showing 
the existence of a exceptional point where the spectrum is degenerate 
and the existence of a geometrical phase as the eigenvalues are brought 
adiabatically around the point. We discuss these results using a 
thermodynamic analogy.


*To join via Zoom*:

https://zoom.us/j/93165098030

Meeting ID: 931 6509 8030

Passcode: 583101