Ankündigung: 01.02.22 ab 16 Uhr - Laws of Nature Series

[antaris]

Moin liebe Foristen,

herr Prof. Dr. Felix Finster wird heute ab 16 Uhr online seine kausale Fermionen Theorie und das kausale Wirkungsprinzip vorstellen.
Ich selber werde es nicht live sehen können, da ich dann auf dem Weg in den Feierabend bin. Man kann sich aber später noch die Aufzeichnung via Youtube zu Gemüte ziehen.

Gruß Jan

Dear Colleagues and Friends,

We are happy to announce our next and, for the Laws of Nature Autumn 2021/22 Series, closing session on

Tuesday, February 1, 16:00 (Brussels time)

about

Causal fermion systems

with our speaker

Felix Finster

Similarly to our session with Jürg Fröhlich on the ETH approach to quantum mechanics, the session will be split into two parts. A first one being a general introduction into the topic to include our entire audience of Physicists, Philosophers, and Mathematicians with interests in quantum mechanics and quantum field theory into the discussion, and a second that is more technical:


1) An introduction to causal fermion systems and the causal action principle

The theory of causal fermion systems is an approach to describe fundamental physics. It gives quantum mechanics, general relativity and quantum field theory as limiting cases and is therefore a candidate for a unified physical theory. Moreover, causal fermion systems provide a general framework for modelling and analyzing non-smooth spacetime structures. The dynamics of a causal fermion system is described by a nonlinear variational principle, the causal action principle.
The aim of my first talk is to give a simple, non-technical introduction. I will proceed chronologically and explain step by step how the underlying concepts and objects evolved from 1990 to today. This will lead us to the abstract definitions. At the end of the talk, the underlying physical principles will be discussed.


2) The continuum limit of causal fermion systems and quantum states

The goal of my second talk is to outline how to get a connection between the causal action principle and usual physical equations formulated in Minkowski space or curved spacetime. On the level of an interaction via classical bosonic fields, this connection is made precise in the so-called continuum limit. I will explain schematically how the analysis in the continuum limit works. In order to get the connection to quantum field theory, a recent approach is to construct a distinguished state at a fixed time, being a positive functional on the algebra generated by fermionic and bosonic field operators. As an outlook, I will explain the general structure of the resulting quantum dynamics.


As usual, please find the ZOOM registration link in the schedule under “Join us live on ZOOM": https://laws-of-nature.net/. This link will lead you to a ZOOM registration page from which you will obtain the ZOOM link for the session.


All news and updates will be posted on https://laws-of-nature.net/.


Looking forward to having you!

The organizers

Angelo Bassi (U Trieste)
Dirk- André Deckert (LMU Munich)
Paula Reichert-Schürmer (LMU Munich)
Ward Struyve (U Leuven)