ELFT HÍRADÓ

[Janos Asboth <asboth AT phy.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

október 9. péntek 10h15,
online a Microsoft Teamsben,
Join Microsoft Teams Meeting
<https://teams.microsoft.com/l/meetup-join/19%3ab4b4bbf8d3b344b8a67d84381f119f8c%40thread.tacv2/1602088970154?context=%7b%22Tid%22%3a%226a3548ab-7570-4271-91a8-58da00697029%22%2c%22Oid%22%3a%22c7eaf7d2-684b-4597-b217-6a9121400219%22%7d>

Németh Dániel (Jagiellonian University, Krakow):

Quantum Universes on a computer - the CDT approach

Causal Dynamical Triangulations (CDT) is an attempt to quantize gravity via
lattice regularization, where 4-dimensional tetrahedra play the role of the
building blocks of space-time. The mathematical basis of CDT is a mixture
of Regge calculus and Feynman path integral formulation. Numerical
simulations show that CDT has a well defined semiclassical limit as the
classical solution emerges in the form of the de-Sitter space-time. The
Einstein-Hilbert action has a very simple form, with three bare coupling
constants. The space of couplings reveals a rich phase structure of four
phases with first and higher order phase transitions. In the recent years
two different spatial boundary conditions were analyzed and no significant
difference was found between sphere and torus. The most recent research is
focused on implementing scalar fields, massive particles and applying RG
methods. During my talk I will give a review about the current state of the
field.

Minden érdeklődőt szeretettel várunk.

Asbóth János
szemináriumi koordinátor