440 citations · 3.8k across the 81 of their papers we have counts for
47 papers · 1 filter
Halbach Magnetic Weber Bars
Valerie Domcke, Itay M. Bloch
Magnetic Weber Bars have been proposed to search for gravitational waves in the kHz to GHz regime by exploiting the mechanical deformation of a large magnet induced by a gravitatio…
The decay rate of metastable cosmic strings beyond the thin-string approximation
Valerie Domcke, Yu Hamada
In the context of grand unified theories, any cosmic strings present in the post-inflationary universe are likely to be metastable, with a decay rate set by the spontaneous creatio…
A Limit on the Total Lepton Number in the Universe from BBN and the CMB
Valerie Domcke, Miguel Escudero, Mario Fernandez Navarro +1
At temperatures below the QCD phase transition, any substantial lepton number in the Universe can only be present within the neutrino sector. In this work, we systematically explor…
Spontaneous Magnetogenesis at the Electroweak Phase Transition
Valerie Domcke, Yohei Ema, Teerthal Patel
Spontaneous CP violation during the electroweak phase transition can induce a twisting of the magnetic field configuration of Standard Model dumbbells, resulting in sizable interga…
Lepton Flavor Asymmetries: from the early Universe to BBN
Valerie Domcke, Miguel Escudero, Mario Fernandez Navarro +1
Large primordial lepton flavor asymmetries with almost vanishing total baryon-minus-lepton number can evade the usual BBN and CMB constraints if neutrino oscillations lead to perfe…
Dielectric Haloscopes as Gravitational Wave Detectors
Valerie Domcke, Sebastian A. R. Ellis, Joachim Kopp
We argue that dielectric haloscopes like MADMAX, originally designed for detecting axion dark matter, are also very promising gravitational wave detectors. Operated in resonant mod…
Magnets are Weber Bar Gravitational Wave Detectors
Valerie Domcke, Sebastian A. R. Ellis, Nicholas L. Rodd
When a gravitational wave (GW) passes through a DC magnetic field, it couples to the conducting wires carrying the currents which generate the magnetic field, causing them to oscil…
Metastable cosmic strings
Wilfried Buchmuller, Valerie Domcke, Kai Schmitz
Many symmetry breaking patterns in grand unified theories (GUTs) give rise to cosmic strings that eventually decay when pairs of GUT monopoles spontaneously nucleate along the stri…
Symmetries and Selection Rules: Optimising Axion Haloscopes for Gravitational Wave Searches
Valerie Domcke, Camilo Garcia-Cely, Sung Mook Lee +1
In the presence of electromagnetic fields, both axions and gravitational waves (GWs) induce oscillating magnetic fields: a potentially detectable fingerprint of their presence. We…
High-Frequency Gravitational Wave Detection via Optical Frequency Modulation
Torsten Bringmann, Valerie Domcke, Elina Fuchs +1
High-frequency gravitational waves can be detected by observing the frequency modulation they impart on photons. We discuss fundamental limitations to this method related to the fa…
Baryogenesis from Decaying Magnetic Helicity in Axiogenesis
Raymond T. Co, Valerie Domcke, Keisuke Harigaya
Generating axion dark matter through the kinetic misalignment mechanism implies the generation of large asymmetries for Standard Model fermions in the early universe. Even if these…
Wash-in leptogenesis after axion inflation
Valerie Domcke, Kohei Kamada, Kyohei Mukaida +2
CP violation and the violation of baryon-minus-lepton number B-L do not necessarily have to occur simultaneously in order to accomplish successful leptogenesis. Instead, it suffice…
A new constraint on primordial lepton flavour asymmetries
Valerie Domcke, Kohei Kamada, Kyohei Mukaida +2
A chiral chemical potential present in the early universe can source helical hypermagnetic fields through the chiral plasma instability. If these hypermagnetic fields survive until…
Charge transfer between rotating complex scalar fields
Valerie Domcke, Keisuke Harigaya, Kyohei Mukaida
We consider the transfer of a U(1) charge density between Bose-Einstein condensates of complex scalar fields coupled to a thermal bath, focusing on the case of a homogeneous Afflec…
Transient phenomena in the axion assisted Schwinger effect
Valerie Domcke, Yohei Ema, Kyohei Mukaida
Particle production induced by a time-dependent background is well understood as the projection of the time-evolved initial state onto a set of final states. While the asymptotic i…
A novel search for high-frequency gravitational waves with low-mass axion haloscopes
Valerie Domcke, Camilo Garcia-Cely, Nicholas L. Rodd
Gravitational waves (GWs) generate oscillating electromagnetic effects in the vicinity of external electric and magnetic fields. We discuss this phenomenon with a particular focus…
Stochastic gravitational-wave background from metastable cosmic strings
Wilfried Buchmuller, Valerie Domcke, Kai Schmitz
A metastable cosmic-string network is a generic consequence of many grand unified theories (GUTs) when combined with cosmic inflation. Metastable cosmic strings are not topological…
Cosmological Relaxation through the Dark Axion Portal
Valerie Domcke, Kai Schmitz, Tevong You
The dark axion portal is a coupling of an axion-like particle to a dark photon kinetically mixed with the visible photon. We show how this portal, when applied to the relaxion, can…
Axion assisted Schwinger effect
Valerie Domcke, Yohei Ema, Kyohei Mukaida
We point out an enhancement of the pair production rate of charged fermions in a strong electric field in the presence of time dependent classical axion-like background field, whic…
Wash-In Leptogenesis
Valerie Domcke, Kohei Kamada, Kyohei Mukaida +2
We present a leptogenesis mechanism based on the standard type-I seesaw model that successfully operates at right-handed-neutrino masses as low as a few 100 TeV. This mechanism, wh…
MeV-scale Seesaw and Leptogenesis
Valerie Domcke, Marco Drewes, Marco Hufnagel +1
We study the type-I seesaw model with three right-handed neutrinos and Majorana masses below the pion mass. In this mass range, the model parameter space is not only strongly const…
Spontaneous Baryogenesis from Axions with Generic Couplings
Valerie Domcke, Yohei Ema, Kyohei Mukaida +1
Axion-like particles can source the baryon asymmetry of our Universe through spontaneous baryogenesis. Here we clarify that this is a generic outcome for essentially any coupling o…
Probing the scale of grand unification with gravitational waves
Wilfried Buchmuller, Valerie Domcke, Hitoshi Murayama +1
The spontaneous breaking of U(1)_B-L around the scale of grand unification can simultaneously account for hybrid inflation, leptogenesis, and neutralino dark matter, thus resolving…
Chiral Anomaly, Schwinger Effect, Euler-Heisenberg Lagrangian, and application to axion inflation
Valerie Domcke, Yohei Ema, Kyohei Mukaida
Particle production in strong electromagnetic fields is a recurring theme in solid state physics, heavy ion collisions, early universe cosmology and formal quantum field theory. In…