[hep-th] [esf-qg] NCG and Physics Seminar - Quantum Gravity (fwd)

[Marko Vojinovic]

Pozdrav svima,

Evo najave za jos jedan zanimljiv seminar. John Barrett je jedan od "otaca" spinfoam modela kvantne gravitacije, Louis Crane i on su formulisali prvi netrivijalan 4D spinfoam model (tzv. Barrett-Crane model), po ugledu na koji su kasnije pravljeni svi ostali 4D modeli.

Gledajuci apstrakt, ovaj put ce izgleda da prica o Wick-ovoj rotaciji, preporucujem.

:-)
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: Thu, 21 Oct 2021 10:40:47 +0000
From: Andrzej Sitarz <andrzej.sitarz at uj.edu.pl>
To: "esf-qg at lists.nottingham.ac.uk" <esf-qg at lists.nottingham.ac.uk>
Subject: [esf-qg] NCG and Physics Seminar - Quantum Gravity

Dear all, 
we invite you to the next NCGandPhysics seminar:
The Euclidean contour rotation in quantum gravity
by John Barrett (University of Nottingham)

Mon Oct 25, 17:00-18:00 (CEST)

See https://researchseminars.org/talk/NCGandPH/7/ for your local time.

Zoom link:

https://zoom.us/j/95488431396?pwd=d0lyUjYzSU5zbEhrUTBqSlZMNjV4dz09

Meeting ID: 954 8843 1396
Passcode: 031050

See you all there (please distribute it around)!

Francesco D'Andrea, Paolo Aschieri, Edwin Beggs, Emil Prodan, Andrzej Sitarz

----------------------------------------------------

Abstract:  The talk will discuss the rotation of the contour of functional integration in quantum gravity from Lorentzian geometries to Euclidean geometries. In the usual framework of
metric tensors, the functional integral does not have a good definition and so the formulas are necessarily heuristic. However, it is hoped that these formulas will provide exact
mathematical results when applied to theories that are constructed with a fundamental Planck scale cut-off.



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