High Energy Seminar

High Energy Seminar:" Many Facets of Conformal Field Theories"

Location: 
Ross Bldg. 1st floor seminar room
Thu, 09/01/2020 - 14:00 to 15:30

Lecturer: Anatoly Dymarsky
Abstract:
I will explain why conformal field theories play a central role in modern quest to understand fundamental interactions and quantum gravity and then discuss recent progress "solving" conformal field theories in various dimensions.

Dr. Shahar Hod

Location: 
Kaplun Building, seminar room, 2nd floor
Wed, 07/12/2011 - 12:00 to 13:00

Subject: "The Black-Hole Bomb" & "Hairy Black Holes and Null Circular Geodesics"

Dr. Bom Soo Kim,Tel-Aviv University

Tue, 25/02/2014 - 12:00 to 13:00

White Dove Conference Hall at Neve-Shalom :
We formulate a universal hydrodynamic description for theories without boost invariance, a non-trivial extension of Landau and Lifshitz. New transport coefficients, one in neutral and two more in charged fluids, are uncovered. While the description is applicable for the Lorentz (or Galilean) invariant theories with broken boost invariance, we focus on its application to Quantum Critical theories with Lifshitz scaling symmetry.

Dr. Manuela Kulaxizi

Location: 
White Dove Conference Hall at Neve-Shalom
Tue, 26/02/2013 - 10:30 to 11:30

"TBA" (Dr. Manuela Kulaxizi, Université Libre de Bruxelles):

Mr. Tomer Shacham

Location: 
White Dove Conference Hall at Neve-Shalom
Tue, 05/03/2013 - 12:00 to 13:00

A Non-Renormalization Theorem in Three Dimensional Quantum Field Theory:
We discuss the two-point functions of the U(1) current and energy-momentum tensor in certain gapped three-dimensional field theories. We show that the parity-odd part in both of these correlation functions is one-loop exact. In particular, we find a new and simplified derivation of the Coleman-Hill theorem that also clarifies several subtleties in the original argument. For the energy momentum tensor, our result means that the gravitational Chern-Simons term for the background metric is one-loop exact.

Dr. Itamar Yaakov‏ - Supersymmetric Renyi Entropy"

Location: 
White Dove Conference Hall at Neve-Shalom
Tue, 05/11/2013 - 10:30 to 11:30

The Renyi entropy is a generalization of entanglement entropy which can be used to further characterize the ground state of a quantum field theory. I'll present an observable, analogous to the Renyi entropy, which is defined for a 3d gauge theory preserving four supercharges, and which preserves a subset of the supersymmetry. Using localization techniques, this supersymmetric Renyi entropy can be calculated exactly for a variety of strongly coupled 3d gauge theories. I’ll present the results of this calculation and some examples from interesting 3d models.

Prof. David Tong,University of Cambridge

Location: 
White Dove Conference Hall at Neve-Shalom
Tue, 01/04/2014 - 10:30 to 11:30

"Holography with Large N=4":
The holographic dual of string theory on AdS3 x S3 x S3 x S1 has a large N=4 superalgebra and has long been mysterious. I will describe a 2d gauge theory with N=(0,4) supersymmetry and will argue that it flows, in the infra-red, to a theory with large N=4 and the correct central charge.