ELFT HÍRADÓ

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

Dear All,

Due to train disruption on the Wien-Budapest line, today's seminar will
start at least 30 minutes later than usual.

ápr. 25 péntek* 10h50*,
1111 Bp., Budafoki út 8., BME FIII. magasföldszint 1, szemináriumi szoba

és online:
https://teams.microsoft.com/l/meetup-join/19%3ae1a26210676841cdbb27bb01cf353392%40thread.tacv2/1745493984575?context=%7b%22Tid%22%3a%226a3548ab-7570-4271-91a8-58da00697029%22%2c%22Oid%22%3a%22c7eaf7d2-684b-4597-b217-6a9121400219%22%7d

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

Sorry for the inconvenience,
 Janos Asboth

On Thu, Apr 24, 2025 at 1:27 PM Janos Asboth <asboth.janos AT ttk.bme.hu>
wrote:

> Meghívó
>
> BME Elméleti Fizika Szeminárium,
>
> ápr. 25 péntek 10h15,
> 1111 Bp., Budafoki út 8., BME FIII. magasföldszint 1, szemináriumi szoba
>
> és online:
>
> https://teams.microsoft.com/l/meetup-join/19%3ae1a26210676841cdbb27bb01cf353392%40thread.tacv2/1745493984575?context=%7b%22Tid%22%3a%226a3548ab-7570-4271-91a8-58da00697029%22%2c%22Oid%22%3a%22c7eaf7d2-684b-4597-b217-6a9121400219%22%7d
>
> 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
>
>