Date

Monday, June 15, 2020 - 15:30

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

Date

Wednesday, June 24, 2020 - 13:00 to 15:00

Our new Deigo Cluster is coming! Learn all about the migration, and ask us any questions you may have.

Date

Wednesday, June 10, 2020 - 14:00

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. 

Date

Monday, June 22, 2020 - 15:00 to 16:00

TQM unit is holding a Zoom seminar.

Date

Monday, June 8, 2020 - 15:30

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. 

 

Date

Wednesday, April 1, 2020 - 10:30

This session will represent an introduction to several more advanced topological topics that are important in different branches of mathematics and physics.

Date

Thursday, March 26, 2020 - 14:00

We will discuss algebraic properties of knot surgery diagrams that turn out to be useful tools to simplify the description of a three manifod.

Date

Thursday, March 19, 2020 - 09:30

We will focus this lecture on the concept of homology and its relation to the handle decomposition of manifolds.

Date

Monday, June 1, 2020 - 17:00
Title: Novel Perspectives in String Phenomenology
 
Speaker: Alon E. Faraggi, University of Liverpool, UK
 
Abstract:

I will review the structure of the fermionic Z2xZ2 orbifolds that produced a large space of phenomenological three generation models. I will discuss the trial and error old school method that gave rise to the first known string derived MSSM models, as well as the more modern classification methods that enables the analysis of large spaces of vacua and extraction of some of the global properties underlying them, e.g. spinor--vector duality. I will discuss a new direction of research that was initiated over the past year. Since the mid-eighties it is known that in addition to the ten dimensional tachyon free heterotic-string vacua there exist tachyonic ten dimensional vacua. In the supersymmetric and non-supersymmetric tachyon free cases the ten dimensional tachyon are projected out by the same projection. I will discuss the construction of phenomenological tachyon free models starting from the tachyonic 10D vacua and their particular features.

Date

Monday, May 25, 2020 - 16:00

Title: How Domain Walls of N=1, D=4 SYM look like

Speaker: Dmitri Sorokin, University of Padua, Italy

Abstract: We review main features of the pure N=1, D=4 SYM with the gauge group SU(N) and its effective description by the Veneziano-Yankielowicz generalized sigma-model. We then indicate that the construction of BPS domain walls interpolating between different SYM vacua requires the presence of a dynamical membrane source. We will show how such a membrane is coupled to the SYM and present the explicit form of BPS domain walls which it creates in the Veneziano-Yankielowicz effective theory. In particular, we will describe 1/2 BPS domain wall configurations with |k| less than or equal to N/3, where k is the membrane charge that sets the "distance" between two distinct SUSY vacua. 

 

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