# The Theory of Causal Fermion Systems

## Events

Here you find information on conferences, workshops and seminar talks related to causal fermion systems.

## Working Seminar "Mathematical Physics" in the Winter Term 2020/21

The seminar takes place online via Zoom. If you would like to attend the talks, please let us know via e*mail*. We will send you the Meeting-ID and password.

- Friday, October 23, 2020, at 14:30 (always German time): YouTube
*José M. Isidro*, Universidad Politécnica de Valencia, “An introduction to the chiral anomaly” - Friday, November 6, 2020, at 15:00: YouTube, Slides
*Michael Kiessling*, Rutgers University, “On the general-relativistic quantum-mechanical spectrum of hydrogenic ions” - Thursday, November 12, 2020, at 8:30:
*Magdalena Lottner*, Universität Regensburg, “The chain rule for causal fermion systems in the infinite-dimensional setting and Hölder continuity of the causal Lagrangian” - Friday, November 13, 2020, at 14:30: YouTube, Notes
*Felix Finster*, Universität Regensburg, “A mechanism for baryogenesis in causal fermion systems” - Thursday, November 19, 2020, at 8:30:
*Marco Oppio*, Universität Regensburg, “Hölder continuity of the integrated causal Lagrangian in Minkowski space” - Friday, November 20, 2020, at 14:30: YouTube, Slides
*Claudio Paganini*, Universität Regensburg and Albert-Einstein-Institut, Potsdam, “Incompatibility of frequency splitting and spatial localization: A quantitative analysis of Hegerfeldt’s theorem” - Thursday, November 26, 2020, at 8:30:
*Christoph Langer*, Universität Regensburg, “The Euler-Lagrange equations of the homogeneous causal variational principle” - Friday, November 27, 2020, at 14:30: Video
*Eduardo Guendelman*, Ben Gurion University, “Non-canonical volume-form formulation of modified gravity theories and cosmology“ - Thursday, December 3, 2020, at 8:30:
*Felix Finster*, “A definition of entropy for causal fermion systems” - Friday, December 4, 2020, at 14:30:
*Wolfgang Spitzer*, Fernuniversität Hagen, “Entanglement entropy of the ideal Fermi gas” - Thursday, December 10, 2020, at 8:30:
*Maximilian Jokel*, Universität Regensburg, “Second variations of the causal action and baryogenesis” - Friday, December 11, 2020, at 14:30:
*Felix Finster*, “The quantum state induced by the universal measure” - Thursday, December 17, 2020, at 8:30:
*Saeed Zafari*, Universität Regensburg, “The curvature of the Dirac sphere” - Friday, December 18, 2020, at 14:30:

tba - Thursday, January 14, 2020, at 8:30:
*Christoph Krpoun*, Humboldt-Universität, tba - Friday, January 15, 2021, at 14:30:
*Peter Müller*, LMU München, tba

## Past Events

## Working Seminar "Mathematical Physics" in the Summer Term 2020

The seminar took place online via Zoom.

- Thursday, April 24, 2020, at 8:30 (always German time):
*Felix Finster*, Universität Regensburg, “The nonlinear surface layer integral and the symmetrized Fock norm I” - Thursday, April 30, 2020, at 14:30:
*Felix Finster*, Universität Regensburg, “The nonlinear surface layer integral and the symmetrized Fock norm II” - Thursday, May 7, 2020, at 14:30:
*Felix Finster*, Universität Regensburg, “Extending the commutator inner product in a surface layer” - Friday, May 15, 2020, at 14:30: YouTube
*Saeed Zafari and Felix Finster*, Universität Regensburg, “Towards a Gauß-Bonnet theorem for causal fermion systems” - Friday, May 22, 2020 at 14:30:
*Claudio Paganini*, Universität Regensburg and Albert-Einstein-Institut, Potsdam, “The ETH formulation of quantum theory I” - Friday, May 29, 2020, at 14:30:
*Magdalena Lottner*, Universität Regensburg, “Entanglement entropy in the context of causal fermion systems” - Friday, June 5, 2020 at 14:30:
*Simone Murro*, Università di Trento, “On the Cauchy problem for symmetric hyperbolic systems on globally hyperbolic manifolds with timelike boundary” - Friday, June 12, 2020 at 14:30: YouTube
*Felix Finster*, Universität Regensburg, “Energy estimates and cone structures for the linearized field equations” - Friday, June 19:

No talk because of**LQP Workshop**(see below) - Friday, June 26, 2020 at 14:30: YouTube
*Miguel Sánchez Caja*, Universidad de Granada, “Some techniques related to Causality and Global Hyperbolicity” - Friday, July 3, 2020:
**Colloquium****“Mathematical Physics Regensburg-Munich”**jointly with LMU and TU Munich (co-organized with Dirk Deckert, Wojciech Dybalski and Peter Pickl)- 13:00
*Jens Mund*, Universidade Federal de Juiz de Fora and TU München, “Perturbative construction of a string-localized Dirac field in a Hilbert space representation of QED” - 14:30
*Claudio Dappiaggi*, Università degli Studi di Pavia, “Boundary conditions for Maxwell’s equations on globally hyperbolic spacetimes with timelike boundary”

- 13:00
- Friday, July 10, 2020:
**Colloquium****“Mathematical Physics Regensburg-Munich”**jointly with LMU and TU Munich (co-organized with Dirk Deckert, Wojciech Dybalski and Peter Pickl)- 13:00
*Vincenzo Morinelli*, Università degli Studi di Roma `Tor Vergata’, “Covariant homogeneous nets of standard subspaces” - 14:30
*Nicola Pinamonti*, Università di Genova, “Existence and uniqueness of solutions of the semiclassical Einstein equation in cosmology“

- 13:00
- Friday, July 17, 2020:
- 13:00
*Harald Grosse,*Universität Wien, “A solvable noncommutative Quantum Field Theory” - 14:30
*Claudio Paganini*, Universität Regensburg and Albert-Einstein-Institut, Potsdam, “The ETH formulation of quantum theory II”

- 13:00
- Friday, July 24, 2020 at 14:30:
*Marco Oppio*, Universität Regensburg, “Symmetrized nonlinear surface layer integrals: An example in Minkowski space” - Friday, July 31, 2020 at 14:30: (cancelled)
*Erik Curiel*, LMU München, “Semi-Classical Gravity as Effective Field Theory and the Information-Loss Paradox”

## Seminar talks at Universität Tübingen, July 8 and 9, 2020

- Wednesday, 8 July 2020 (online via Zoom): YouTube, Slides
*Felix Finster*, Universität Regensburg, “Causal fermion systems and the causal action principle” - Thursday, 9 July 2020 (online via Zoom): YouTube, Slides
*Felix Finster*, Universität Regensburg, “A positive mass theorem for static causal fermion systems”

## First Virtual LQP Workshop, June 17-19, 2020

The workshop took place online. For details see the conference website.

*Magdalena Lottner*gave a talk on “Entropy in causal fermion systems” on June 19 at 14:20 British summer time (i.e. 15:20 local time in Germany).

## Conference "Scattering, Microlocal Analysis and Renormalization", May 25 - June 18, 2020

The conference took place online. It was co-organized by *Claudio Dappaggi*. For details see the conference website at Mittag-Leffler Institute and the website of the online conference.

*More information on past events can be found on the research page of Felix Finster at Universität Regensburg.*