ELFT HÍRADÓ

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

Dear All,

The speaker has arrived, we start at 10:40.
Sorry for the many emails.

Janos Asboth

On Fri, Apr 25, 2025 at 9:57 AM Janos Asboth <asboth.janos AT ttk.bme.hu>
wrote:

> 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
>>
>>