83 citations · 792 across the 29 of their papers we have counts for
28 papers
Vector dark matter production during inflation in the gradient-expansion formalism
A. V. Lysenko, O. O. Sobol, S. I. Vilchinskii
A massive vector field is a highly promising candidate for dark matter in the Universe. A salient property of dark matter is its negligible or null coupling to ordinary matter, wit…
Reheating ACTs on Starobinsky and Higgs inflation
D. S. Zharov, O. O. Sobol, S. I. Vilchinskii
In the recent sixth data release (DR6) of the Atacama Cosmology Telescope (ACT) collaboration, the value of for the scalar spectral index is reported,…
Scalar perturbations from inflation in the presence of gauge fields
R. Durrer, R. von Eckardstein, Deepen Garg +3
We study how Abelian-gauge-field production during inflation affects scalar perturbations in the case when the gauge field interacts with the inflaton directly (by means of generic…
Backreaction from gauge fields produced during inflation
R. Durrer, O. Sobol, S. Vilchinskii
In this work, we study general features of a regime where gauge fields produced during inflation cause a strong backreaction on the background evolution and its impact on the spect…
Magnetogenesis in Higgs-Starobinsky inflation
R. Durrer, O. Sobol, S. Vilchinskii
In the framework of mixed Higgs-Starobinsky inflation, we consider the generation of Abelian gauge fields due to their nonminimal coupling to gravity (in two different formulations…
Chirality production during axion inflation
E. V. Gorbar, A. I. Momot, I. V. Rudenok +2
We study the generation of the chiral charge during axion inflation where the pseudoscalar inflaton field couples axially to the electromagnetic field through the term $(β/M_p)…
s- and p-superfluidity of Fermi atoms in Bose-Fermi mixtures
E. V. Gorbar, Y. O. Nikolaieva, I. V. Oleinikova +2
The p-wave superfluid is characterized by nontrivial topological characteristics essential for fault-tolerant quantum state manipulation. However, the practical realization of the…
Hypermagnetogenesis from axion inflation: Model-independent estimates
E. V. Gorbar, K. Schmitz, O. O. Sobol +1
Axion inflation coupled to the Standard Model (SM) hypercharge gauge sector represents an attractive scenario for the generation of primordial hypermagnetic fields. The description…
Gauge-field production during axion inflation in the gradient expansion formalism
E. V. Gorbar, K. Schmitz, O. O. Sobol +1
We study the explosive production of gauge fields during axion inflation in a novel gradient expansion formalism that describes the time evolution of a set of bilinear electromagne…
Generation of an electromagnetic field nonminimally coupled to gravity during Higgs inflation
O. O. Sobol, E. V. Gorbar, O. M. Teslyk +1
In the framework of Higgs inflation, we consider the electromagnetic field nonminimally coupled to gravity via the parity-preserving and parity-violating $\propto…
Gradient expansion formalism for magnetogenesis in the kinetic coupling model
O. O. Sobol, A. V. Lysenko, E. V. Gorbar +1
In order to describe magnetogenesis during inflation in the kinetic coupling model, we utilize a gradient expansion which is based on the fact that only long-wavelength (superhoriz…
Schwinger production of scalar particles during and after inflation from the first principles
O. O. Sobol, E. V. Gorbar, A. I. Momot +1
By using the first-principles approach, we derive a system of three quantum kinetic equations governing the production and evolution of charged scalar particles by an electric fiel…
Kinetic approach to the Schwinger effect during inflation
E. V. Gorbar, A. I. Momot, O. O. Sobol +1
Using the kinetic approach, we study the impact of the charged particles dynamics due to the Schwinger effect on the electric field evolution during inflation. As a simple model of…
Backreaction of electromagnetic fields and the Schwinger effect in pseudoscalar inflation magnetogenesis
O. O. Sobol, E. V. Gorbar, S. I. Vilchinskii
We study magnetogenesis in axionlike inflation driven by a pseudoscalar field coupled axially to the electromagnetic (EM) field with dimensionl…
Spatiotemporal vortex rings in atomic Bose-Einstein condensates
O. G. Chelpanova, Y. I. Kuriatnikov, S. Vilchinskii +1
We investigate spatiotemporal vortex rings with phase dislocation both in space and time. It is demonstrated that these structures naturally appear as a periodical in time edge pha…
Influence of backreaction of electric fields and Schwinger effect on inflationary magnetogenesis
O. O. Sobol, E. V. Gorbar, M. Kamarpour +1
We study the generation of electromagnetic fields during inflation when the conformal invariance of Maxwell's action is broken by the kinetic coupling of the…
p-wave superfluidity in mixtures of ultracold Fermi and spinor Bose gases
O. Y. Matsyshyn, A. I. Yakimenko, E. V. Gorbar +2
We reveal that the p-wave superfluid can be realized in a mixture of fermionic and F=1 bosonic gases. We derive a general set of the gap equations for gaps in the s- and p-channels…
Magnetogenesis during inflation and preheating in the Starobinsky model
S. Vilchinskii, O. Sobol, E. V. Gorbar +1
By assuming the kinetic coupling of the effective inflaton field with the electromagnetic field, we explore magnetogenesis during the inflation and preheating stag…
Anomaly-driven inverse cascade and inhomogeneities in a magnetized chiral plasma in the early Universe
E. V. Gorbar, I. Rudenok, I. A. Shovkovy +1
By making use of a simple model that captures the key features of the anomalous Maxwell equations, we study the role of inhomogeneities on the evolution of magnetic fields in a chi…
Stochastic phase slips in toroidal Bose-Einstein condensates
Kyrylo Snizhko, Karyna Isaieva, Yevhenii Kuriatnikov +3
Motivated by recent experiments we study the influence of thermal noise on the phase slips in toroidal Bose-Einstein condensates with a rotating weak link. We derive a generalized…
Anomalous Maxwell equations for inhomogeneous chiral plasma
E. V. Gorbar, I. A. Shovkovy, S. Vilchinskii +3
Using the chiral kinetic theory we derive the electric and chiral current densities in inhomogeneous relativistic plasma. We also derive equations for the electric and chiral charg…
Stable Hopf solitons in rotating Bose-Einstein condensates
Y. M. Bidasyuk, A. V. Chumachenko, O. O. Prikhodko +3
We reveal that Hopf solitons can be stabilized in rotating atomic Bose-Einstein condensate. The Hopfion is a matter-wave vortex complex which carries two independent winding number…
Generation and decay of persistent current in a toroidal Bose-Einstein condensate
A. I. Yakimenko, S. I. Vilchinskii, Y. M. Bidasyuk +3
Persistent current, or "flow without friction", as well as quantum vortices are the hallmarks of superfluidity. Recently a very long-lived persistent flow of atoms has been experim…
Vortices in a toroidal Bose-Einstein condensate with a rotating weak link
A. I. Yakimenko, Y. M. Bidasyuk, M. Weyrauch +2
Motivated by a recent experiment [K.C. Wright et. al. Phys. Rev. Lett. 110, 025302 (2013)], we investigate deterministic discontinuous jumps between quantized circulation states in…