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SUMMARY:Marcus Reitz (Radboud U.\, IMAPP)
DTSTART:20200924T133000Z
DTEND:20200924T143000Z
DTSTAMP:20260423T052922Z
UID:CENTRA/15
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CENTRA/15/">
 Approximate Killing symmetries in non-perturbative quantum gravity</a>\nby
  Marcus Reitz (Radboud U.\, IMAPP) as part of CENTRA Seminar\n\n\nAbstract
 \nAn open question in quantum gravity is if and how small scale fluctuatio
 ns and inhomogeneities behave in such a way that at some larger scale they
  can be well approximated by a geometry with some number of exact symmetri
 es. Causal Dynamical Triangulation (CDT) is a non-perturbative approach to
  quantum gravity\, based on a lattice regularisation of space-time\, in wh
 ich these kind of questions possibly can be addressed. After a short intro
 duction of the framework\, I will present a specific notion of approximate
  Killing vectors that can be generalised tosimplicial manifolds using the 
 framework of discrete exterior calculus. These discrete approximate Killin
 g vectors show promise as an observable to study effective symmetries in q
 uantum gravity. I will present a comparison between three different two-di
 mensional toy-models of quantum gravity\, CDT\, Dynamical Triangulations a
 nd small perturbations around flat space.\n
LOCATION:https://researchseminars.org/talk/CENTRA/15/
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