Overview
Welcome! This is the page of the Particle Cosmology Münster research group at the Institute for Theoretical Physics. The research group was established in May 2022 and is headed by Kai Schmitz, a newly appointed junior professor in the Physics Department at the University of Münster. The group deals with research topics at the interface of particle physics and cosmology, notably gravitational waves from the early Universe, and is involved in the activities of the NANOGrav Pulsar Timing Array Collaboration. On this page, you will find more information on the following topics ...
Contact
Members
Current group members and guests more
Kai Schmitz | Group leader |
Oleksandr Sobol | Postdoc (Philipp Schwartz fellow) |
Richard von Eckardstein | PhD student |
Tobias Schröder | PhD student |
David Esmyol | MSc student |
Jan-Christopher Knetsch | MSc student |
Dominik Wilken | MSc student |
Nina Cordes | BSc student |
Falk Ludwig | BSc student |
Kim Wassner | BSc student |
Levin Wissing | BSc student |
Msab Zamout | BSc student |
Former group members and guests
Alice Albouy | Guest (MSc student at ENS Lyon, France; thesis: "NANOGrav constraints on an axion spectator field during cosmic inflation") | 03/2024–06/2024 |
Jonah Fabian | BSc student (Thesis: "General relativity and the Kerr metric: Mathematical foundations and equatorial geodesics") | 06/2023–01/2024 |
Peer Kuhlbrodt | BSc student (Thesis: "Estimating the fraction of active galactic nuclei hosting a black-hole binary with cosmological simulations") | 03/2023–01/2024 |
Finn Kohl | Guest (PhD student in the Wulkenhaar research group at the University of Münster) | 04/2023–05/2023 |
Adeela Afzal | Guest (PhD student at Quaid-i-Azam University in Islamabad, Pakistan) | 11/2022–05/2023 |
Peter Stratmann | Guest (PhD student in the Andronic / Klein-Bösing research group at the University of Münster) | 11/2022–12/2022 |
Rafael R. Lino dos Santos | Guest (PhD student at Syddansk Universitet in Odense, Denmark) | 08/2022–02/2023 |
Research
New physics at the PTA frontier more
Topics: Exotic sources in the nHz band
Primordial gravitational waves more
Topics: Cosmic strings, cosmological phase transitions
Axion cosmology more
Topics: Dark matter, magnetic fields, black holes, hierarchy problem
Early Universe more
Topics: Inflation, reheating, baryogenesis, leptogenesis
Teaching
Courses
- Winter 24/25
[118687] Gravitational waves (course)
[118688] Gravitational waves (tutorial) - Sommer 24
[116544] General relativity (course)
[116545] General relativity (tutorial) - Winter 23/24
[114658] Quantum field theory (course)
[114659] Quantum field theory (tutorial) - Sommer 23
[112525] General relativity (course)
[112545] General relativity (tutorial) - Winter 22/23
[110636] Gravitational waves (course)
[110637] Gravitational waves (tutorial) - Summer 22
[118669] Standard model (course)
[118670] Standard model (tutorial)
Seminars
- Winter 24/25
[118686] BSc theory seminar: Seminar on the theory of atoms, nuclei and condensed matter - Winter 23/24
[114666] BSc theory seminar: Seminar on the theory of atoms, nuclei and condensed matter - Winter 22/23
[110281] BSc theory seminar: Seminar on the theory of atoms, nuclei and condensed matter
Publications
Names of group members are printed in boldface.
2024
- [MS-TP-24-13] Nina Cordes, Andrea Mitridate, Kai Schmitz, Tobias Schröder, Kim Wassner
On the overlap reduction function of pulsar timing array searches for gravitational waves in modified gravity - [MS-TP-24-11] Kai Schmitz, Tobias Schröder
Gravitational waves from low-scale cosmic strings
arXiv:2405.10937 YouTube video abstract - [MS-TP-24-10] Ruth Durrer, Richard von Eckardstein, Deepen Garg, Kai Schmitz, Oleksandr Sobol, Stanislav Vilchinskii
Scalar perturbations from inflation in the presence of gauge fields
arXiv:2404.19694 - [MS-TP-24-07] Tobias Schröder, Robert Brandenberger
Embedded domain walls and electroweak baryogenesis
arXiv:2404.13035 YouTube video abstract
2023
- [MS-TP-23-50] Anastasia Lysenko, Oleksandr Sobol
Quantum kinetic approach to the Schwinger production of scalar particles in an expanding universe
Gen. Rel. Grav. 56 (2024) 4, 39 arXiv:2311.15981 - [MS-TP-23-46] Kai Schmitz, Xunjie Xu
Wash-in leptogenesis after the evaporation of primordial black holes
Phys. Lett. B 849 (2024) 138473 arXiv:2311.01089 - [MS-TP-23-38] Richard von Eckardstein, Marco Peloso, Kai Schmitz, Oleksandr Sobol, Lorenzo Sorbo
Axion inflation in the strong-backreaction regime: decay of the Anber-Sorbo solution
JHEP 11 (2023) 183 arXiv:2309.04254 - [MS-TP-23-37] Wilfried Buchmüller, Valerie Domcke, Kai Schmitz
Metastable cosmic strings
JCAP 11 (2023) 020 arXiv:2307.04691 - [MS-TP-23-36] Richard von Eckardstein, Andrea Mitridate, Jonathan Nay, Ken Olum, Kai Schmitz, Tobias Schröder, Tanner Trickle, David Wright
PTArcade
arXiv:2306.16377 - [MS-TP-23-31] NANOGrav Collaboration (incl. Adeela Afzal, Richard von Eckardstein, Rafael R. Lino dos Santos, Kai Schmitz, Tobias Schröder, Peter Stratmann)
The NANOGrav 15 yr data set: Search for signals from new physics
Astrophys. J. Lett. 951 (2023) 1, L11 arXiv:2306.16219 - [MS-TP-23-27] Astrid Eichhorn, Rafael R. Lino dos Santos, João Lucas Miqueleto
From quantum gravity to gravitational waves through cosmic strings
Phys. Rev. D 109 (2024) 2, 2 arXiv:2306.17718 - [MS-TP-23-13] Axel Brandenburg, Kohei Kamada, Kyohei Mukaida, Kai Schmitz, Jennifer Schober
Chiral magnetohydrodynamics with zero total chirality
Phys. Rev. D 108 (2023) 6, 063529 arXiv:2304.06612 - [MS-TP-23-12] Gilles Weymann-Despres, Sophie Henrot-Versillé, Gilbert Moultaka, Vincent Vennin, Laurent Duflot, Richard von Eckardstein
MSSM-inflation revisited: Towards a coherent description of high-energy physics and cosmology
Phys. Rev. D 108 (2023) 2, 023511 arXiv:2304.04534 - [MS-TP-23-06] Ruth Durrer, Oleksandr Sobol, Stanislav Vilchinskii
Backreaction from gauge fields produced during inflation
Phys. Rev. D 108 (2023) 4, 043540 arXiv:2303.04583
2022
- [MS-TP-22-57] Rafael R. Lino dos Santos, Linda van Manen
Gravitational waves from the early universe
arXiv:2212.05594 - [MS-TP-22-37] Valerie Domcke, Kohei Kamada, Kyohei Mukaida, Kai Schmitz, Masaki Yamada
Wash-in leptogenesis after axion inflation
JHEP 01 (2023) 053 arXiv:2210.06412 - [MS-TP-22-23] Valerie Domcke, Kohei Kamada, Kyohei Mukaida, Kai Schmitz, Masaki Yamada
New constraint on primordial lepton flavour asymmetries
Phys. Rev. Lett. 130 (2023) 26, 261803 arXiv:2208.03237 - [MS-TP-22-22] Martin Enriquez-Rojo, Tobias Schröder
Asymptotic symmetries and memories of gauge theories in FLRW spacetimes
JHEP 01 (2023) 011 arXiv:2207.13726 - [MS-TP-22-19] Pierre Auclair, Simone Blasi, Vedran Brdar, Kai Schmitz
Gravitational waves from current-carrying cosmic strings
JCAP 04 (2023) 009 arXiv:2207.03510 YouTube video abstract - [MS-TP-22-17] Alexandros Papageorgiou, Pablo Quílez, Kai Schmitz
Axion dark matter from frictional misalignment
JHEP 01 (2023) 169 arXiv:2206.01129 YouTube video abstract