116 citations · 203 across the 18 of their papers we have counts for
18 papers
Zero-damped modes of near-extremal Reissner--Nordström black holes from exact WKB
Prisco Lo Chiatto, Sebastian Schenk, Nils Wagner +1
The late-time ringdown dynamics of near-extremal black holes (BHs) are expected to be dominated by zero-damped modes (ZDMs), whose decay rates are parametrically suppressed relativ…
Signatures of High-Frequency Gravitational Waves in Electromagnetic Cavities
Sebastian Schenk, Kristof Schmieden, Pedro Schwaller
Similar to axions, gravitational waves (GW) can induce oscillating electromagnetic fields inside electromagnetic cavities. We explore their experimental sensitivity to monochromati…
Exploring Nonperturbative Behaviour of Moments and Cumulants in Quantum Theories
Sebastian Schenk
The dynamics of quantum fields become nonperturbative when their interactions are probed by a large number of particles. To explore this regime we study correlation functions which…
A higher-dimensional geometrical approach for the classification of 2D square-triangle-rhombus tilings
Marianne Imperor-Clerc, Pavel Kalugin, Sebastian Schenk +2
Square-triangle-rhombus () tilings are encountered in various self-organized multi-component systems. They exhibit a rich structural diversity, encompassing both per…
A Coordinate-Independent Formalism for Detecting High-Frequency Gravitational Waves
Wolfram Ratzinger, Sebastian Schenk, Pedro Schwaller
In an external electric or magnetic field, a gravitational wave (GW) may be converted into electromagnetic radiation. We present a coordinate-invariant framework to describe the GW…
Quantum Imprint of the Anharmonic Oscillator
Prisco Lo Chiatto, Sebastian Schenk, Felix Yu
We study the anharmonic double well in quantum mechanics using exact Wentzel-Kramers-Brillouin (WKB) methods in a 't Hooft-like double scaling limit where classical behavior is exp…
Primordial gravitational waves in the nano-Hertz regime and PTA data -- towards solving the GW inverse problem
Eric Madge, Enrico Morgante, Cristina Puchades-Ibáñez +4
In recent years, several pulsar timing array collaborations have reported first hints for a stochastic gravitational wave background at nano-Hertz frequencies. Here we elaborate on…
Charting the Skyrmion Free-Energy Landscape
Juan Carlos Criado, Peter D. Hatton, Álvaro Lanza +2
Chiral magnets with Dzyaloshinskii-Moriya interactions feature a rich phase diagram with a variety of thermodynamical phases. These include helical and conical spin arrangements an…
Towards a Quantum Simulation of Nonlinear Sigma Models with a Topological Term
Jack Y. Araz, Sebastian Schenk, Michael Spannowsky
We determine the mass gap of a two-dimensional nonlinear sigma model augmented with a topological -term using tensor network and digital quantum algorithms. As proof of p…
Multiparticle Amplitudes in a Scalar EFT
Valentin V. Khoze, Sebastian Schenk
At sufficiently high energies the production of a very large number of particles is kinematically allowed. However, it is well-known that already in the simplest case of a weakly-c…
Simulating magnetic antiskyrmions on the lattice
Juan C. Criado, Peter D. Hatton, Sebastian Schenk +2
Magnetic skyrmions are topologically protected spin structures that naturally emerge in magnetic materials. While a vast amount of effort has gone into the study of their propertie…
The Breakdown of Resummed Perturbation Theory at High Energies
Sebastian Schenk
Calculations of high-energy processes involving the production of a large number of particles in weakly-coupled quantum field theories have previously signaled the need for novel n…
Challenging the Stability of Light Millicharged Dark Matter
Joerg Jaeckel, Sebastian Schenk
We investigate the cosmological stability of light bosonic dark matter carrying a tiny electric charge. In the wave-like regime of high occupation numbers, annihilation into gauge…
Exploring instantons with spin-lattice systems
Sebastian Schenk, Michael Spannowsky
Instanton processes are present in a variety of quantum field theories relevant to high energy as well as condensed matter physics. While they have led to important theoretical ins…
Probing Dark Matter Clumps, Strings and Domain Walls with Gravitational Wave Detectors
Joerg Jaeckel, Sebastian Schenk, Michael Spannowsky
Gravitational wave astronomy has recently emerged as a new way to study our Universe. In this work, we survey the potential of gravitational wave interferometers to detect macrosco…
Very Light Asymmetric Dark Matter
Gonzalo Alonso-Álvarez, Julia Gehrlein, Joerg Jaeckel +1
Very light dark matter is usually taken to consist of uncharged bosons such as axion-like particles or dark photons. Here, we consider the prospect of very light, possibly even sub…
Exploring High Multiplicity Amplitudes: The QM Analogue of the Spontaneously Broken Case
Joerg Jaeckel, Sebastian Schenk
Calculations of high multiplicity Higgs amplitudes exhibit a rapid growth that may signal an end of perturbative behavior or even the need for new physics phenomena. As a step towa…
Exploring High Multiplicity Amplitudes in Quantum Mechanics
Joerg Jaeckel, Sebastian Schenk
Calculations of amplitudes in scalar field theories at very high multiplicities exhibit an extremely rapid growth with the number of final state particles. This either…