HEP department seminar by Jan Ambjørn

Monday 4 Apr 2022, 12:30 → 13:30 Europe/Amsterdam

https://urldefense.com/v3/__https://radbouduniversity.zoom.us/j/828394 (Zoom)

TITLE:  Topology induced 1st order phase transitions in CDT

Abstract: In the CDT model of quantum gravity one considers, using the path integral formalism,  ensembles of 4d geometries with a fixed topology. However, the ``effective'' topology of a generic configuration can be different from the underlying defining topology. I will describe recent numerical results which indicate a relation between the "effective" topologies of spacetimes and the order of the  phase transitions the ensembles of geometries can undergo.

HEP seminar Jan Ambjorn 04-04-2022.pdf