243 citations · 1.3k across the 43 of their papers we have counts for
44 papers
Kelvin waves in nonequilibrium universal dynamics of relativistic scalar field theories
Viktoria Noel, Thomas Gasenzer, Kirill Boguslavski
We investigate the different degrees of freedom underlying far-from-equilibrium scaling behaviour in a relativistic, single-component scalar field theory in two and…
Designing weight regularizations based on Lefschetz thimbles to stabilize complex Langevin
Kirill Boguslavski, Paul Hotzy, David I. Müller
The complex Langevin (CL) method shows significant potential in addressing the numerical sign problem. Nonetheless, it often produces incorrect results when used without any stabil…
Lefschetz thimble-inspired weight regularizations for complex Langevin simulations
Kirill Boguslavski, Paul Hotzy, David I. Müller
Complex Langevin (CL) is a computational method to circumvent the numerical sign problem with applications in finite-density quantum chromodynamics and the real-time dynamics of qu…
Condensation and prescaling in spatial Polyakov loop correlations far from equilibrium
Daniel Spitz, Kirill Boguslavski, Thimo Preis
The far-from-equilibrium dynamics of spatial Polyakov loop correlations, which provide gauge-invariant observables akin to effective particle numbers for gluon plasmas, are investi…
Soft-gluon exchange matters: isotropic screening in QCD kinetic theory
Kirill Boguslavski, Florian Lindenbauer
QCD kinetic theory simulations are a prominent tool for studying the nonequilibrium initial stages in heavy-ion collisions. Despite their success, all implementations rely on appro…
Heavy-quark diffusion in 2+1D and Glasma-like plasmas: evidence of a transport peak
Liane Backfried, Kirill Boguslavski, Paul Hotzy
We examine how plasma excitations affect the heavy-quark diffusion coefficient in 2+1 dimensional and Glasma-like plasmas, akin to the pre-equilibrium matter describing relativisti…
Limiting attractors in heavy-ion collisions -- the interplay between bottom-up and hydrodynamic attractors
Kirill Boguslavski, Aleksi Kurkela, Tuomas Lappi +2
In this contribution to the Quark Matter 2023 proceedings, we study the hydrodynamization process in heavy-ion collisions using QCD kinetic theory and introduce the new concept of…
Advancing real-time Yang-Mills: towards real-time observables from first principles
Kirill Boguslavski, Paul Hotzy, David I. Müller
The complex Langevin (CL) method shows great promise in enabling the calculation of observables for theories with complex actions. Nevertheless, real-time quantum field theories ha…
Heavy quark momentum diffusion coefficient during hydrodynamization via effective kinetic theory
Kirill Boguslavski, Aleksi Kurkela, Tuomas Lappi +2
In these proceedings, we compute the heavy quark momentum diffusion coefficient using QCD effective kinetic theory for a plasma going through the bottom-up thermalization scenario…
Limiting attractors in heavy-ion collisions
Kirill Boguslavski, Aleksi Kurkela, Tuomas Lappi +2
We study universal features of the hydrodynamization process in heavy-ion collisions using QCD kinetic theory simulations for a wide range of couplings. We introduce the new concep…
Highly anisotropic lattices for Yang-Mills theory
Kirill Boguslavski, Paul Hotzy, David I. Müller +1
In this conference proceeding, we investigate the physical anisotropy in terms of the temporal and spatial lattice spacings in relation to the bare parameters of SU(2) pure gauge t…
Conserved energy-momentum tensor for real-time lattice simulations
Kirill Boguslavski, Tuomas Lappi, Jarkko Peuron +1
We derive an expression for the energy-momentum tensor in the discrete lattice formulation of pure glue QCD. The resulting expression satisfies the continuity equation for energy c…
Real-time correlators in 3+1D thermal lattice gauge theory
Kirill Boguslavski, Paul Hotzy, David I. Müller
We present the first direct ab-initio computation of unequal-time correlation functions in non-Abelian lattice gauge theory. We demonstrate non-trivial consistency relations among…
Jet quenching parameter in QCD kinetic theory
Kirill Boguslavski, Aleksi Kurkela, Tuomas Lappi +2
We study the jet quenching parameter in a non-equilibrium plasma using the QCD effective kinetic theory. We discuss subleading terms at large jet momentum p, show that our…
Heavy quark diffusion coefficient during hydrodynamization -- non-equilibrium vs. equilibrium
Kirill Boguslavski, Aleksi Kurkela, Tuomas Lappi +2
We compute the heavy quark momentum diffusion coefficient using effective kinetic theory for a system going through bottom-up isotropization until approximate hydrodynamization. We…
Order parameters for gauge invariant condensation far from equilibrium
Jürgen Berges, Kirill Boguslavski, Lillian de Bruin +2
Nuclear collisions at sufficiently high energies are expected to produce far-from-equilibrium matter with a high density of gluons at early times. We show gauge condensation, which…
Jet momentum broadening during initial stages in heavy-ion collisions
Kirill Boguslavski, Aleksi Kurkela, Tuomas Lappi +2
We study the jet quenching parameter in the initial pre-equilibrium stages of heavy-ion collisions using the QCD kinetic theory description of the anisotropic quark-gluon…
Heavy quark diffusion coefficient in heavy-ion collisions via kinetic theory
Kirill Boguslavski, Aleksi Kurkela, Tuomas Lappi +2
We compute the heavy quark momentum diffusion coefficient using QCD kinetic theory for a system going through bottom-up isotropization in the initial stages of a heavy ion coll…
Probing universal dynamics with topological data analysis in a gluonic plasma
Daniel Spitz, Kirill Boguslavski, Jürgen Berges
We study nonequilibrium dynamics of SU(2) lattice gauge theory in Minkowski space-time in a classical-statistical regime, where characteristic gluon occupancies are much larger tha…
Stabilizing complex Langevin for real-time gauge theories with an anisotropic kernel
Kirill Boguslavski, Paul Hotzy, David I. Müller
The complex Langevin (CL) method is a promising approach to overcome the sign problem that occurs in real-time formulations of quantum field theories. Using the Schwinger-Keldysh f…
A stabilizing kernel for complex Langevin simulations of real-time gauge theories
Kirill Boguslavski, Paul Hotzy, David I. Müller
The complex Langevin (CL) method is a promising approach to overcome the sign problem, which emerges in real-time formulations of quantum field theories. Over the past decade, stab…
Non-equilibrium attractor in high-temperature QCD plasmas
Dekrayat Almaalol, Kirill Boguslavski, Aleksi Kurkela +1
We establish the existence of a far-from-equilibrium attractor in weakly-coupled gauge theory undergoing 0+1d Bjorken expansion which goes beyond the energy-momentum tensor to the…
Long and short distance behavior of the imaginary part of the heavy-quark potential
Kirill Boguslavski, Babak Kasmaei, Michael Strickland
The imaginary part of the effective heavy-quark potential is related to the total in-medium decay width of heavy quark-antiquark bound states. We extract the static limit of this q…
Fermion and gluon spectral functions far from equilibrium
Kirill Boguslavski, Tuomas Lappi, Sören Schlichting
Motivated by the quark-gluon plasma, we develop a simulation method to obtain the spectral function of (Wilson) fermions non-perturbatively in a non-Abelian gauge theory with large…