# Seminars & Colloquia Calendar

## The SYK model: a window into black holes and non-Fermi liquids

#### Subir Sachdev - Harvard University

Location: ** zoom**

Date & time: Wednesday, 18 August 2021 at 10:45AM - 11:45AM

Abstract: The Sachdev-Ye-Kitaev model is perhaps the only solvable quantum many-body system without quasiparticle excitations. I will introduce some of its basic properties, and describe its low energy theory, expressed in terms of a path integral over time reparameterizations. I will then introduce the Gibbons-Hawking quantum theory of charged black holes in Einstein gravity, and show that it has the same low temperature theory as the SYK model: this yields a universal correction to the Bekenstein-Hawking black hole entropy. The resulting picture of the low energy states of a black hole differs from that of supersymmetric black holes solved via string theory. Finally I will discuss a quantum generalization of the Sherrington-Kirkpatrick spin glass model, with S=1/2 spins, SU(2) spin symmetry, and mobile charge carriers: this displays non-Fermi liquid physics connected to the SYK model.

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Brooke Logan

Wujun Zhang Organizer's webpage

P. Gupta, X.Huang and J. Song Organizer's webpage

Swastik Kopparty, Sepehr Assadi Seminar webpage

Jeffry Kahn, Bhargav Narayanan, Jinyoung Park Organizer's webpage

Brooke Ogrodnik, Website

Robert Dougherty-Bliss and Doron Zeilberger --> homepage

Paul Feehan, Daniel Ketover, Natasa Sesum Organizer's webpage

Lev Borisov, Emanuel Diaconescu, Angela Gibney, Nicolas Tarasca, and Chris Woodward Organizer's webpage

Jason Saied Seminar webpage

Brian Pinsky, Rashmika Goswami website

Quentin Dubroff Organizer's webpage

James Holland; Organizer website

Edna Jones Organizer's webpage

Brooke Ogrodnik website

Yanyan Li, Zheng-Chao Han, Jian Song, Natasa Sesum Organizer's Webpage

Organizer: Luochen Zhao

Yanyan Li, Zheng-Chao Han, Natasa Sesum, Jian Song Organizer's Page

Lisa Carbone, Yi-Zhi Huang, James Lepowsky, Siddhartha Sahi Organizer's webpage

Simon Thomas website

Kasper Larsen, Daniel Ocone and Kim Weston Organizer's page

Joel Lebowitz, Michael Kiessling

Yanyan Li, Haim Brezis Organizer's Webpage

Stephen D. Miller, John C. Miller, Alex V. Kontorovich, Alex Walker seminar website

Stephen D. Miller

Brooke Ogrodnik, Website

Organizers: Yanyan Li, Z.C. Han, Jian Song, Natasa Sesum

Yael Davidov Seminar webpage

Kristen Hendricks, Xiaochun Rong, Hongbin Sun, Chenxi Wu Organizer's page

Fioralba Cakoni Seminar webpage

Ebru Toprak, Organizer

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