[hep-th] Topological Quantum Field Theory announcement [Please do not reply] (fwd)

[Marko Vojinovic]

Pozdrav svima,

Tijana ce u sredu drzati online seminar u okviru TQFT Club ciklusa, prosledjujem najavu nize. Obratite paznju da je Lisabon u GMT vremenskoj zoni, tako da predavanje zapravo pocinje u 18:00 po CEST (Beogradskom) vremenu.

:-)
Marko


Dr. Marko Vojinovic
Group for Gravitation, Particles and Fields
Institute of Physics
University of Belgrade
======================
home page: www.markovojinovic.com
e-mail:    vmarko at ipb.ac.rs



---------- Forwarded message ----------
Date: Fri,  8 Oct 2021 15:01:02 +0100 (WEST)
From: announcements at math.tecnico.ulisboa.pt
To: rpicken at math.tecnico.ulisboa.pt
Subject: Topological Quantum Field Theory announcement [Please do not reply]

                                                                      Topological Quantum Field Theory Seminar   RSS

To be held online at: https://videoconf-colibri.zoom.us/j/265183098

Online access password: functor

   Tijana Radenković 13/10/2021, 17:00 — 18:00 Europe/Lisbon — Online Instituto Superior Técnicohttp://tecnico.ulisboa.pt
   Tijana Radenković, Institute of Physics, Belgrade

   Topological higher gauge theory — from 2BF to 3BF theory

       We study a generalization of BF-theories in the context of higher gauge theory. We construct a topological state sum $Z$, based on the classical 3BF action for a general
       semistrict Lie 3-group and a triangulation of a 4-dimensional spacetime manifold. The 3BF action is constructed using a 2-crossed module which encodes a 3-group (as
       introduced by Picken and Faria Martins [1]), while the state sum $Z$ is an example of Porter’s TQFT [2] for $d=4$ and $n=3$. In order to verify that the constructed state
       sum is a topological invariant of the underlying manifold, its behavior under Pachner moves is analyzed, and it is obtained that the state sum $Z$ remains the same. Our
       results are a generalization of the work done by Girelli, Pfeiffer, and Popescu [3] for the case of state sum based on the classical 2BF action with the underlying 2-group
       structure.

        1. J. Faria Martins and R. Picken, Diff. Geom. Appl . 29, 179 (2011), arXiv:0907.2566.
        2. T. Porter, J. Lond. Math. Soc. (2)58, No. 3, 723 (1998), MR 1678163.
        3. F. Girelli, H. Pfeiffer and E. M. Popescu, Jour. Math. Phys. 49, 032503 (2008), arXiv:0708.3051.

Local participants are invited to join us in room 3.10 (3rd floor, Mathematics Department, Instituto Superior Técnico). 

Please note that the TQFT club seminars will in principle be shifting to Wednesdays instead of Fridays, at the same time, 5 p.m. Lisbon time, at least until March 2022.

link

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Current organizers: Roger Picken, John Huerta, Marko Stošić.

Mathseminars page.

FCT Projects PTDC/MAT-GEO/3319/2014, Quantization and Kähler Geometry, PTDC/MAT-PUR/31089/2017, Higher Structures and Applications.

CAMGSD FCT

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Visit our video channel. Recent videos include talk(s) by: João Faria Martins, Fabian Haiden.

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