The Theory of Causal Fermion Systems

Events

Semester

Summer 25
Winter 24/25
Summer 24
Winter 23/24
Summer 23
Winter 22/23
Summer 22
Winter 21/22
Summer 21
Winter 20/21
Summer 20
Earlier events

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

Conference "Causal Fermion Systems 2025: New Perspectives in Mathematics and Physics"

Universität Regensburg, October 6-10, 2025

Working Seminar "Mathematical Physics" in the Summer Term 2025

The seminar takes place in hybrid format, both in the lecture room and via Zoom. If you would like to attend the talks, please let us know at mail@causal-fermion-system.com. We will send you the Meeting-ID and password.

  • Tuesday, April 8, 2025, 20th Colloquium “Mathematics and Foundations of Quantum Theory” jointly with Dirk Deckert (München),  Peter Pickl (Tübingen) and Wojciech Dybalski (Poznan): Takes part in Poznań, Poland.
    • 14:00–14:45: Ko Sanders, Universität Hannover, tba
    • 14:45–15:30: Marcin Napiórkowski, University of Warsaw, tba
    • 16:15–17:00: Shadi Tahvildar-Zadeh, Rutgers University, tba
    • 17:00–17:30: Fabian Nolte, LMU München, tba
    • 17:30–18:00: Marco van den Beld Serrano, Universität Regensburg, tba
  • Thursday, April 24, 2025, at 08:30 in M102: tba
  • Friday, April 25, 2025, at 14:30 in M103: tba
  • Thursday, May 1, 2025: no talk (holiday)
  • Friday, May 2, 2025, at 14:30: tba
  • Thursday, May 8, 2025 at 8:30: tba
  • Friday, May 9, 2025, at 14:30: tba
  • Thursday, May 15, 2025 at 8:30: tba
  • Friday, May 16, 2025, at 14:30: tba
  • Thursday, May 22, 2025, at 08:30: tba
  • Friday, May 23, 2025, at 14:30: tba
  • Thursday, May 29, 2025 at 8:30: no talk (holiday)
  • Friday, May 30, 2025, at 14:30: tba
  • Thursday, June 5, 2025 at 8:30: tba
  • Friday, June 6, 2025, at 14:30:
    Maximilian Bachmaier, MPI München, tba
  • Thursday, June 12, 2025 at 8:30: tba
  • Friday, June 13, 2025, at 14:30: tba
  • Thursday, June 19, 2025 at 8:30: no talk (holiday)
  • Friday, June 20, 2025, at 14:30: tba
  • Thursday, June 26, 2025 at 8:30: tba
  • Friday, June 27, 2025, at 14:30: tba
  • Thursday, July 3, 2025 at 8:30: tba
  • Friday, July 4, 2025, at 14:30: tba
  • Thursday, July 10, 2025 at 8:30: tba
  • Friday, July 11, 2025, at 14:30: tba
  • Thursday, July 17, 2025 at 8:30: tba
  • Friday, July 18, 2025, at 14:30: tba
  • Thursday, July 24, 2025 at 8:30: tba
  • Friday, July 25, 2025, at 14:30: no talk (Tag der Mathematik)

BIRS-IMAG Workshop "Geometry, Analysis, and Physics in Lorentzian Signature"

Instituto de Matemáticas, Universidad de Granada
Granada, Spain, May 4-9, 2025

  • Felix Finster, Universität Regensburg:
    “Causal fermion systems as an approach to non-smooth geometry”

Workshop "A new geometry for Einstein’s theory of relativity and beyond"

Fakultät für Mathematik, Universität Wien,
Wien, Austria, February 24-28, 2025

Working Seminar "Mathematical Physics" in the Winter Term 2024/25

  • Tuesday, October 1, 2024, 19th Colloquium “Mathematics and Foundations of Quantum Theory,”
    jointly with Dirk Deckert (München),  Peter Pickl (Tübingen) and Wojciech Dybalski (Poznan): Takes place at Universität Tübingen.
  • Thursday, October 17, 2024, at 14:15:
    Felix Finster, Universität Regensburg, “An appproximate decoupling of the linearized field equation into bosonic and fermionic equations”
  • Friday, October 18, 2024, at 14:30:
    Felix Finster, Universität Regensburg, “Canonical construction of the extended Hilbert space of causal fermion systems”
  • Thursday, October 24, 2024, at 14:15:
    Ding Jia. Perimeter Institute, Waterloo, Canada, “Path integrals for gravity: From causal structure to singularities”
  • Thursday, October 31, 2024, at 14:15: Video, Slides
    Achim Kempf, University of Waterloo, Canada, “Generalized Noether theorem: The metric is derivable from the non-conservation of energy-momentum”
  • Friday, Noverber 1, 2024, at 14:30: no talk (holiday)
  • Thursday, November 7, 2024, at 14:15:
    Shane Farnsworth, Universität Regensburg, “Open problems in Nonassociative Geometry”
  • Friday, November 8, 2024, at 14:30:
    Felix Finster, Universität Regensburg, “A regularized Dirac dynamics in curved spacetime”
  • Friday, November 15, 2024, at 14:30: Slides
    Clemens Sämann, Universität Wien, “Non-regular spacetime geometry via metric geometry and optimal transport”
  • Thursday, November 21, 2024, at 14:15:
    Patrick Fischer, Universität Regensburg, “Analysis of the linearized field equations in Minkowksi space”
  • Friday, November 29, 2024, at 14:30:
    Felix Finster, Universität Regensburg, “Basics on regularized measure convergence of Riemannian manifolds”
  • Friday, November 29, 2024: jointly with OSMU24, Youtube
    Antonino Marcianò, Fudan University, Shanghai, “Gravi-weak unification”
  • Thursday, December 5, 2024, at 14:15:
    Claudio Paganini, TU Chemnitz, “Trapping in general black hole spacetimes”
  • Friday, December 6, 2024, at 14:30: Video, Slides
    Alessandro Pesci, INFN Bologna, “qmetric: A tool to describe the small-scale structure of spacetime”
  • Thursday, December 12, 2024, at 14:15:
    Marco van den Beld-Serrano, “Baryogenesis in conformally flat spacetimes”
  • Friday, December 13, 2024, at 14:30: Video, Slides
    Damiano Anselmi, Università di Pisa, “The Breakdown of Microcausality in Quantum Gravity via Purely Virtual Particles”
  • Thursday, December 19, 2024, at 14:15:
    Martin Pröbstl, Universität Regensburg, “On energy and momentum of causal fermion systems”
  • Thursday, January 9, 2025, at 14:15:
    Felix Finster, Universität Regensburg, “On the connection between adiabatic projections and the regularized Dirac dynamics”
  • Friday, January 10, 2025 : no talk
  • Thursday, January 16, 2025, at 14:15:
    Gabriel Schmid, Università di Genova, “The Cauchy problem for symmetric hyperbolic systems with nonlocal potential I”
  • Thursday, January 23, 2025, at 14:15:
    Gabriel Schmid, Università di Genova, “The Cauchy problem for symmetric hyperbolic systems with nonlocal potential II”
  • Friday, January 24, 2025, at 14:30:
    Patrick Fischer and Claudio Paganini, Universität Regensburg, tba
  • Thursday, January 30, 2025, at 14:15:
    Jan Pawlowski, Universität Heidelberg, “Particle physics and unitarity from asymptotically safe correlation functions”
  • Friday, January 31, 2025, at 14:30: YouTube , Slides
    Jacob Barandes, Harvard University, “A fundamental correspondence between stochastic processes and quantum systems”
  • Thursday, February 6, 2025, at 14:15:
    Felix Finster, Universität Regensburg, “Deriving effective actions from the causal action principle”
  • Friday, February 7, 2025, at 14:30: no talk (Tag der Mathematik)
  • Monday, February 10, 2025, at 13:30:
    Sari Ghanem, Beijing Institute of Mathematical Sciences and Applications, “Dispersive estimates for the Einstein-Yang-Mills fields with small data”

Working Seminar "Mathematical Physics" in the Summer Term 2024

Workshop "Exploring the Quantum Boundaries: an Odyssey into the gravity related collapse models"

Laboratori Nazionali di Frascati INFN
Frascati, Italy, June 12-14, 2024

Workshop "A Modern Odyssey: Quantum gravity meets quantum collapse at qtomic and nuclear physics energy scales in the cosmic silence"

ECT* European centre for theoretical studies in nuclear physics and related areas
Trento, Italy, June 3-7, 2024

Working Seminar "Mathematical Physics" in the Winter Term 2023/24

Working Seminar "Mathematical Physics" in the Summer Term 2023

47th LQP Workshop "Local Quantum Physics"

Adam Mickiewicz University in Poznań, Poland
September 21-22, 2023

  • Friday, September 22, 2023: Slides
    Felix Finster, Universität Regensburg: “The fermionic entanglement entropy and area laws”

Workshop "Colmo": Quantum collapse investigated with particle, nuclear, atomic and macro systems

ECT* European centre for theoretical studies in nuclear physics and related areas
Trento, Italy, July 3-7, 2023

Online Lecture Series "Octonions, Standard Model, and Unification"

organized and hosted by Tejinder Singh (IUCAA, Pune) and Michael Wright (ATRMSP, Oxford)

  • Friday, April 21, 2023: YouTube, Slides
    Felix Finster    , Universität Regensburg, “Causal fermions and octonions”

Conference "Foundations of Observational, Classical and Semi-Classical Gravitational Physics and the Problem of Agency and Laws of Nature"

LMU München, March 28-31, 2023

Workshop “Non-regular Spacetime Geometry”

Erwin-Schrödinger-Institut, Wien, March 13-24, 2023

Working Seminar "Mathematical Physics" in the Winter Term 2022/23

  • Tuesday, September 27, 2022, at 10:30  (always Brussels time)
    Tejinder Singh, Tata Institute, Mumbai, “Why do elementary particles have such strange mass ratios?”
  • Thursday, October 20, 2022, at 8:30:
    Felix Finster, Universität Regensburg, “A positivity argument for minimizers of causal variational principles I”
  • Friday, October 21, 2022, at 14:30:
    Magdalena Lottner, Universität Regensburg, “The entanglement entropy of the regularized Dirac sea in Minkowski space”
  • Thursday, October 27, 2022, at 8:30: Slides
    Daniele Volpe, Università di Trento, “Møller operators and Hadamard states for Proca fields in paracausally related spacetimes”
  • Friday, October 28, 2022, at 14:30:
    Sami Abdallah, Universität Regensburg, “Explicit examples of minimizers of causal variational principles”
  • Thursday, November 3, 2022, at 8:30:
    Johannes Wurm, Universität Regensburg, “Mass, energy and total momentum of causal fermion systems”
  • Friday, November 4, 2022, at 14:30: Slides
    Marco van den Beld Serrano, Universität Regensburg, “Low regularity inextendibility of spacetimes”
  • Thursday, November 10, 2022, at 8:30:
    Felix Finster, Universität Regensburg, “A positivity argument for minimizers of causal variational principles II”
  • Thursday, November 17, 2022, at 8:30:
    Johannes Kleiner, LMU München, “A universality result for time-homogeneous quantum stochastic processes”
  • Friday, November 18, 2022, at 14:30:
    Claudio Paganini, Universität Regensburg, “An introduction to thermodynamical gravity”
  • Thursday, November 24, 2022, at 8:30:
    Felix Finster, Universität Regensburg, “On the connection between area change and matter flux for causal fermion systems”
  • Tuesday, November 29, 2022, at 14:15 in DE-1.127 (new biology building): Slides
    Franz Gmeineder, Universität Konstanz, “On optimal incompatible Korn inequalities”
  • Thursday, December 1, 2022, at 8:30:
    Saeed Zafari, Universität Regensburg, “A Gauss-Bonnet theorem for causal fermion systems”
  • Thursday, December 8, 2022, at 8:30: Mathematical Physics Colloquium Regensburg-Erlangen, jointly with Gandalf Lechner: Slides
    Claudio Dappiaggi, Università degli Studi di Pavia, “Stochastic Partial Differential Equations and Renormalization à la Epstein-Glaser”
  • Friday, December 9, 2022, at 14:30:
    Claudio Paganini, Universität Regensburg, “FAQ on causal fermion systems and good answers”
  • Thursday, December 15, 2022, at 8:30:
    Claudio Paganini, Universität Regensburg, “An introduction to thermodynamical gravity II”
  • Friday, December 16, 2022, at 14:30: YouTube
    Alexander Sobolev, University College London, “Regularity of solutions for the Coulomb multi-particle Schrödinger equation, and the one-particle density matrix”
  • Thursday, December 22, 2022, at 8:30:
    Martin Pröbstl, Universität Regensburg, “The ADM mass of a static, asymptotically flat spacetime”
  • Thursday, January 12, 2023, at 8:30:
    Claudio Paganini, Universität Regensburg, “A mechanism of baryogenesis for causal fermion systems”
  • Thursday, January 19, 2023, at 8:30:
    Christoph Krpoun, Universität Regensburg, “The Dirac propagator in the Reissner-Nordström geometry in horizon-penetrating coordinates”
  • Friday, January 20, 2023, at 14:30: Slides
    Erik Curiel, LMU München, “Energy, entropy and the intimate relations between them in semi-classical gravity”
  • Thursday, January 26, 2023, at 8:30:
    Magadalena Lottner, Universität Regensburg, “Fermionic entanglement entropy for a subregion of Minkowski space in the infinite volume limit”
  • Friday, January 27, 2023, at 14:30: Slides
    Detlef Lehmann, Hochschule Rhein-Main, “The dynamics of the Hubbard model through stochastic calculus and Girsanov transformation”
  • Thursday, February 2, 2023, at 8:30:
    Felix Finster, Universität Regensburg, “FAQ on causal fermion systems and good answers II”
  • Friday, February 3, 2023, at 14:30: YouTube
    Shane Farnsworth, Albert-Einstein-Institut, Potsdam, “Jordan geometry and particle physics”
  • Tuesday, February 7, 2023, 16th Colloquium “Mathematics and Foundations of Quantum Theory” jointly with Dirk Deckert (München),  Peter Pickl (Tübingen) and Wojciech Dybalski (Poznan)

Workshop “Mathematical and Conceptual Aspects of Quantum Theory”

Banff International Research Station, Oaxaca, México

Working Seminar "Mathematical Physics" in the Summer Term 2022

Laws of Nature, Discussion series on Quantum Theory and Relativity

Working Seminar "Mathematical Physics" in the Winter Term 2021/22

Working Seminar "Mathematical Physics" in the Summer Term 2021

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

  • Friday, October 23, 2020, at 14:30 (always Brussels 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: YouTube
    Felix Finster, Universität Regensburg, “A definition of entropy for causal fermion systems”
  • Friday, December 4, 2020, at 14:30: YouTube, Slides
    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: YouTube
    Felix Finster, Universität Regensburg, “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”
  • Thursday, January 7, 2021, at 8:30: YouTube
    Felix Finster, Universität Regensburg, “Baryogenesis in causal fermion systems: Conservation laws and scalings”
  • Friday, January 8, 2021, at 14:30: YouTube
    Christoph Langer, Universität Regensburg, “Causal variational principles in the infinite-dimensional setting: Existence of minimizers”
  • Thursday, January 14, 2020, at 8:30: YouTube, Slides
    Christoph Krpoun, Humboldt-Universität zu Berlin, “The Dirac equation and its separation in the Reissner-Nordström geometry”
  • Friday, January 15, 2021, at 14:30: YouTube
    Peter Müller, LMU München, “Entanglement entropy for quasi-free Fermi gases”
  • Thursday, January 21, 2021, at 8:30:
    Johannes Wurm, Universität Regensburg, “On the definition of the total mass for causal fermion systems”
  • Friday, January 22, 2021, at 14:30: YouTube
    Albert Much, Universität Leipzig, “Strict deformation quantization in curved spacetimes”
  • Thursday, January 28, 2021, at 8:30: YouTube
    Felix Finster, Universität Regensburg, “Baryogenesis in causal fermion systems: The dynamics of the regularization”
  • Friday, January 29, 2021, at 14:30: YouTube, Slides
    Sami Abdallah    , Universität Leipzig, “Trace anomaly for chiral fermions”
  • Thursday, February 4, 2021, at 8:30: YouTube, Slides
    Christiaan van de Ven, Università di Trento, “Asymptotic equivalence of two strict deformation quantizations and applications to the classical limit”
  • Friday, February 5, 2021: Colloquium “Mathematical Physics Regensburg-Munich” jointly with LMU and TU Munich (co-organized with Dirk Deckert, Wojciech Dybalski and Peter Pickl)
  • Friday, February 12, 2021, at 14:30: YouTube
    Eric Ling, Rutgers University, “Spacetime extensions of the big bang”
  • Thursday, February 25, 2021, at 8:30:
    Magdalena Lottner, Universität Regensburg, “Towards an area law for the Klein-Gordon projector”
  • Friday, February 26, 2021, at 14:30: YouTube
    Claudio Paganini, Universität Regensburg and Albert-Einstein-Institut, Potsdam, “Ideas on baryogenesis”

Working Seminar "Mathematical Physics" in the Summer Term 2020

  • Thursday, April 24, 2020, at 8:30 (always Brussels 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)
  • 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)
  • Friday, July 17, 2020:
  • Friday, July 24, 2020 at 14:30:
    Marco Oppio, Universität Regensburg, “Symmetrized nonlinear surface layer integrals: An example in Minkowski space”

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

First Virtual LQP Workshop, June 17-19, 2020

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

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