Talk by Professor Eugenio Bianchi, Dept. of Physics, Pennsylvania State University at QASTM seminar
Channel: Sayantan Choudhury
Date: 13/07/2020

Title: Typicality of Small Spins in Primordial Black Holes:
from the Bekenstein-Hawking Entropy to Gravitational Wave Observations

Abstract: Black hole entropy is a robust prediction of quantum gravity with no explored phenomenological consequences to date. In this talk, I discuss how the Bekenstein-Hawking entropy formula allows us to determine the probability distribution of the spin of black holes produced by the collapse of perturbations distributed according to a general relativistic microcanonical ensemble. I will also discuss why this ensemble is relevant for black holes formed in the early universe, resulting in a population of black holes with zero spin. In principle, the identification of such a population at LIGO, Virgo, and future gravitational wave observatories could provide the first observational evidence for the statistical nature of black hole entropy. 

Speaker: Professor Eugenio Bianchi, Department of Physics and Institute for Gravitation & the Cosmos Center for Fundamental Theory, Pennsylvania State University, Pennsylvania, USA.

Date and Time: 13 th July 2020, 3:00 PM to 5:00 PM

Contact: Dr. Sayantan Choudhury (sayantan.choudhury@aei.mpg.de)