Sasha Tchekhovskoy, Simulating Black Hole Feasts, Burps, Fireworks, and Gravitational Waves (2:00 PM - 3:15 PM)

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Ibrahima Bah, Topological stars in gravity (2:00 PM - 3:00 PM)

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Robert Cava, Working at the boundary where Solid State Chemistry, Mineralogy and Materials Science Meet Materials Physics (4:00 PM - 5:30 PM)

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, Grad Pheno Journal Club (2:00 PM - 3:00 PM)

Eli Waxman, Strong NIR emission following a long duration GRB: Neutron Star merger or Dust sublimation? (2:00 PM - 3:15 PM)

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Kim Berghaus, The Cosmology of Dark Energy Radiation (2:00 PM - 3:00 PM)

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Eli Waxman, ULTRASAT: Revolutionizing Our Understanding of the Hot Transient Universe (4:00 PM - 5:30 PM)

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Lam Hui, Black hole perturbation theory: Love numbers and nonlinear ring-down (2:00 PM - 3:15 PM)

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Alberto Nicolis, Cosmology as a weak gravitational field and the trans-Planckian problem (2:00 PM - 3:00 PM)

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David Spergel, CMB as a Probe of Astrophysics and the Early Universe (4:00 PM - 5:15 PM)

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Zare (3:30 PM - 5:30 PM)

(12:30 PM - 1:30 PM)

Tomer Yavetz, Stream Fanning and Bifurcations: Observing Fundamental Dynamics in Stellar Stream Morphology (2:00 PM - 3:00 PM)

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(2:00 PM - 3:15 PM)

, Equity & Inclusion Committee (12:30 PM - 2:00 PM)

Gil Refael, Floquet Engineering in the Era of Topological Physics and Quantum Coherent Devices (4:00 PM - 5:30 PM)

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, No Astro Seminar (2:00 PM - 3:15 PM)

Joaquin Turiaci, Black hole spin-statistics (2:00 PM - 3:00 PM)

-- Abstract: Black holes are believed to be described by a quantum system with a large number of degrees of freedom given, in the classical limit, by the area of the event horizon. This was verified extensively in string theory using the index of the putative quantum system since, in the context of supersymmetric theories, it can be computed at weak coupling. In the first part of the talk I describe how to compute the index of the black hole quantum system from a gravitational path integral. This was puzzling for some time since periodic fermions seem to be singular at the event horizon. In the second part of the talk I describe work in progress that uses this insight to compute "(-1)^F" in non-supersymmetric theories, giving us a gravitational prediction to the number of fermionic vs bosonic black holes in a theory of quantum gravity.

Arvind Murugan, Learning without Neurons (4:00 PM - 5:30 PM)

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