ELFT HÍRADÓ

[Janos Asboth <asboth.janos AT ttk.bme.hu>]

Meghívó

BME Elméleti Fizika Szeminárium,

ápr. 11 péntek 10h15,
1111 Bp., Budafoki út 8., BME FIII. magasföldszint 1, szemináriumi szoba

Németh Dániel (Radboud University, NL):
Dimensions and Topologies from simplicial quantum gravity

The framework of this talk will be Causal Dynamical Triangulations, which
is a lattice approach to quantum gravity. Using a discretized version of
the Einstein-Hilbert action, CDT predicts the existence of a 4-dimensional
deSitter spacetime. The lattice description allows for the incorporation of
matter fields too, similarly as it is done for standard Lattice QCD. There
is one caveat though, that is the nontrivial notion of dimension and
topology. I will show what it means to have an effective description of
spacetime dimension (DOI 10.1088/1361-6382/acd0fc) via the introduction of
the discrete Laplacian operator and also show a phase-transition in
topology using an interaction between scalar fields and the background
geometry (DOI 10.1088/1361-6382/ac2135). Furthermore I will present results
regarding the implementation of SU(N) Yang-Mills gauge fields and the
topological charge as an observable (arXiv:2411.12668).

Minden érdeklődőt szeretettel várunk.
Asbóth János,
 szemináriumi koordinátor