73 citations · 820 across the 37 of their papers we have counts for
37 papers
Dynamics of nucleation in thermal phase transitions
Oliver Gould, Joonas Hirvonen, Andrey Shkerin +1
We study dynamical effects during nucleation in thermal first-order phase transitions in field theory. Focusing on the classical regime of the decay of a metastable state, we prese…
New Gauge Forces, Neutron Stars and Schwinger Neutrino Production
Yuxin Liu, Zhen Liu, Andrey Shkerin +2
We investigate neutrino effects of new long-range forces arising from gauging , or symmetries of the Standard Model. The leptonic potential generated b…
False vacuum decay catalyzed by black hole in a heat bath
Bowen Hu, Kohei Kamada, Andrey Shkerin
We study false vacuum decay catalyzed by black holes. We consider a scalar field model with unstable potential in the background of a dilaton black hole in two dimensions. The mode…
Holographic phase transitions via thermally-assisted tunneling
Tony Gherghetta, Arpon Paul, Andrey Shkerin
We construct the thermal bounce solution in holographic models that describes first-order phase transitions between the deconfined and confined phases in strongly-coupled gauge the…
Simple third order operator-splitting schemes for stochastic mechanics and field theory
Andrey Shkerin, Sergey Sibiryakov
We present a method for constructing numerical schemes with up to 3rd strong convergence order for solution of a class of stochastic differential equations, including equations of…
Thermal false vacuum decay in (1+1)-dimensions: Evidence for non-equilibrium dynamics
Dalila Pîrvu, Andrey Shkerin, Sergey Sibiryakov
We numerically study the evolution of a classical real scalar field in dimensions with initial conditions describing thermal fluctuations around a metastable vacuum. We t…
Thermal False Vacuum Decay Is More Than It Seems
Dalila Pîrvu, Andrey Shkerin, Sergey Sibiryakov
We study the decay of a thermally excited metastable vacuum in classical field theory using real-time numerical simulations. We find a significantly lower decay rate than predicted…
Nontopological Electromagnetic Hedgehogs
Yulia Galushkina, Emin Nugaev, Andrey Shkerin
We study classical localised configurations - solitons - in a theory of self-interacting complex Proca field with the global symmetry. We focus on spherically-symmetric soli…
Probing the Local Dark Matter Halo with Neutrino Oscillations
Tony Gherghetta, Andrey Shkerin
Dark matter particles can form halos gravitationally bound to massive astrophysical objects. The Earth could have such a halo where depending on the particle mass, the halo either…
On thermal false vacuum decay around black holes
Vadim Briaud, Andrey Shkerin, Sergey Sibiryakov
In flat space and at finite temperature, there are two regimes of false vacuum decay in quantum field theory. At low temperature, the decay proceeds through thermally-assisted tunn…
Non-perturbative production of fermionic dark matter from fast preheating
Juraj Klaric, Andrey Shkerin, Georgios Vacalis
We investigate non-perturbative production of fermionic dark matter in the early universe. We study analytically the gravitational production mechanism accompanied by the coupling…
Out of this world neutrino oscillations
Tony Gherghetta, Andrey Shkerin
We study how vacuum neutrino oscillations can be affected by a causal, nonlinear and state-dependent modification of quantum field theory that may be interpreted using the many-wor…
Gravitational Portals with Non-Minimal Couplings
Simon Clery, Yann Mambrini, Keith A. Olive +2
We consider the effects of non-minimal couplings to curvature of the form , for three types of scalars: the Higgs boson, the inflaton, and a scalar dark matter candidate…
Preheating in Palatini Higgs inflation on the lattice
Frédéric Dux, Adrien Florio, Juraj Klarić +2
We study preheating following Higgs inflation in the Palatini formulation of gravity. We numerically evolve perturbations of the radial mode of the Higgs field and that of three sc…
Black hole induced false vacuum decay: The role of greybody factors
Andrey Shkerin, Sergey Sibiryakov
We study false vacuum decay catalyzed by black holes. We consider a toy two-dimensional model of a scalar field with an unstable potential in the background of a dilaton black hole…
Scale and Weyl Invariance in Einstein-Cartan Gravity
Georgios K. Karananas, Mikhail Shaposhnikov, Andrey Shkerin +1
We show how Einstein-Cartan gravity can accommodate both global scale and local scale (Weyl) invariance. To this end, we construct a wide class of models with nonpropagaing torsion…
Matter matters in Einstein-Cartan gravity
Georgios K. Karananas, Mikhail Shaposhnikov, Andrey Shkerin +1
We study scalar, fermionic and gauge fields coupled nonminimally to gravity in the Einstein-Cartan formulation. We construct a wide class of models with nondynamical torsion whose…
Black hole induced false vacuum decay from first principles
Andrey Shkerin, Sergey Sibiryakov
We provide a method to calculate the rate of false vacuum decay induced by a black hole. The method uses complex tunneling solutions and consistently takes into account the structu…
Einstein-Cartan Portal to Dark Matter
Mikhail Shaposhnikov, Andrey Shkerin, Inar Timiryasov +1
It is well-known since the works of Utiyama and Kibble that the gravitational force can be obtained by gauging the Poincaré group, which puts gravity on the same footing as the Sta…
Einstein-Cartan gravity, matter, and scale-invariant generalization
Mikhail Shaposhnikov, Andrey Shkerin, Inar Timiryasov +1
We study gravity coupled to scalar and fermion fields in the Einstein-Cartan framework. We discuss the most general form of the action that contains terms of mass dimension not big…
Higgs inflation in Einstein-Cartan gravity
Mikhail Shaposhnikov, Andrey Shkerin, Inar Timiryasov +1
We study inflation driven by the Higgs field in the Einstein-Cartan formulation of gravity. In this theory, the presence of the Holst and Nieh-Yan terms with the Higgs field non-mi…
Unveiling complex vector dark matter by magnetic field
Emin Nugaev, Andrey Shkerin
We discuss the possibility that dark matter is made of a new complex massive vector field with a global -symmetry. The field interacts with the Standard Model via coupling to…
Quantum Effects in Palatini Higgs Inflation
Mikhail Shaposhnikov, Andrey Shkerin, Sebastian Zell
We study quantum effects in Higgs inflation in the Palatini formulation of gravity, in which the metric and connection are treated as independent variables. We exploit the fact tha…
Standard Model Meets Gravity: Electroweak Symmetry Breaking and Inflation
Mikhail Shaposhnikov, Andrey Shkerin, Sebastian Zell
We propose a model for combining the Standard Model (SM) with gravity. It relies on a non-minimal coupling of the Higgs field to the Ricci scalar and on the Palatini formulation of…