Theoretical Physics Seminar: Matthias Gohlke

Theoretical Physics Seminar.
Speaker: Matthias Gohlke (Quantum what's the Matter).
Title: "Kitaev's honeycomb model: an exactly solvable quantum spin liquid"

Journal club seminar: Recent Progress on Black Hole Information

Title: Recent Progress on Black Hole Information

Abstract: We are going to discuss String Theory conference talk by J. Maldacena   "Review: Recent progress on the black hole information paradox". Slava Lysov will lead the discussion. 

Group Meeting Talk: Current Algebras and Celestial CFT Correlators

Title: Current Algebras and Celestial CFT Correlators

Speaker: Sudip Ghosh

Abstract: I will discuss the construction of a SL(2,C) current algebra using the subleading soft graviton theorem and the constraints imposed by this current algebra via null state relations on the spectrum of the putative CFT dual of Einstein gravity in (3+1)-d asymptotically flat spacetimes.

Theoretical Physics Seminar: 'Hannes Schoenke

Theoretical Physics Seminar.
Speaker: 'Hannes Schoenke (Mathematics, Mechanics, Materials, and other aspects of M Theory).
Title: "A glimpse into the beauty of algebraic geometry (examples included!)"

Journal club seminar: AdS3 gravity and random CFT

Title: AdS3 gravity and random CFT

Abstract: We are goin to discuss the recent paper by Jordan Cotler and Kristan Jensen   "AdS3 gravity and random CFT". Yasha Neiman will lead the discussion. 

Group Meeting Talk: Large N Phase Transitions and Small AdS-Schwarzschild Black Holes

Large N Phase Transitions and Small AdS-Schwarzschild Black Holes

Speaker: Sudip Ghosh

Abstract: We will discuss aspects of small AdS-Schwarzschild Black Holes in the context of the AdS/CFT correspondence. In particular we will consider issues related to dynamical instabilities of small black holes and their dual interpretation in the boundary gauge theory at large N. 

Journal club seminar: Extended TQFT

Title: Extended TQFT

Abstract: This talk is the continuation of my TQFT discussion from last week. I am going to discuss the extended TQFT as an open-closed strings following the nice paper by Aaron D. Lauda, Hendryk Pfeiffer  "Open-closed strings: Two-dimensional extended TQFTs and Frobenius algebras". After that I am going to discuss 2-categories approach and compare it with asymptotic symmetries and edge modes. 

QG group meeting: boundary locality vs. higher-spin symmetry

QG group meeting.
Speaker: Yasha Neiman
Title: "Boundary locality vs. higher-spin symmetry"

Journal club seminar:Strings from Massive Higher Spins: The Asymptotic Uniqueness of the Veneziano Amplitude

Title: Strings from Massive Higher Spins: The Asymptotic Uniqueness of the Veneziano Amplitude

Abstract: We are going to discuss the recent paper by Simon Caron-Huot, Zohar Komargodski, Amit Sever and Alexander Zhiboedov  "Strings from Massive Higher Spins: The Asymptotic Uniqueness of the Veneziano Amplitude". Dorian Weissman will be leading the discussion. 

QG group meeting: TQFT and Asymptotic Symmetries

Title : TQFT and Asymptotic symmetries

Speaker: Vyacheslav  Lysov

Abstract: I will provide an introduction to topological quantum field theories (TQFT) and their generalization - Extended TQFT. Using the TQFT framework I am going to discuss the behaviour of Hilbert spaces, associated to the  boundary components, under the gluing.