A5050796261- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Physics of Superconductivity and Magnetism
- Superconducting Materials and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum chaos and dynamical systems
- Theoretical and Computational Physics
- Stochastic processes and statistical mechanics
- Pulsars and Gravitational Waves Research
- Atomic and Subatomic Physics Research
- Quantum and electron transport phenomena
- Inorganic Fluorides and Related Compounds
- Fusion and Plasma Physics Studies
- Rare-earth and actinide compounds
- advanced mathematical theories
- Synthesis and characterization of novel inorganic/organometallic compounds
- Advanced NMR Techniques and Applications
- Machine Learning in Materials Science
- Quantum and Classical Electrodynamics
- Advanced Algebra and Geometry
- Dark Matter and Cosmic Phenomena
- Topological Materials and Phenomena
- PI3K/AKT/mTOR signaling in cancer
Far Eastern Federal University
2015-2025
Kurchatov Institute
2015-2025
Institute for High Energy Physics
2014-2023
Institute for Theoretical and Experimental Physics
2011-2021
Osaka University
2020
RIKEN Nishina Center
2020
Massachusetts Institute of Technology
2020
Moscow Institute of Physics and Technology
2018-2019
Joint Institute for Nuclear Research
2008-2018
Moscow Engineering Physics Institute
2018
We perform a study of the effects from maximal Abelian gauge Gribov copies in context dual superconductor scenario confinement, on basis novel approach for estimation systematic uncertainties incomplete fixing. present numerical results, SU(2) lattice theory, using overrelaxed simulated annealing gauge-fixing algorithm. find and non-Abelian string tensions to differ significantly, their ratio being 0.92(4) at $\ensuremath{\beta}=2.5115$. An approximate factorization potential into monopole...
QCD lattice simulations with 2+1 flavours (when two quark are mass degenerate) typically start at rather large up-down and strange masses extrapolate first the then to its respective physical value. Here we discuss an alternative method of tuning masses, in which singlet is kept fixed. Using group theory possible polynomials for a Taylor expansion about flavour symmetric line found, general 1+1+1 case case. This ensures that kaon always has less than mass. enables highly constrained...
We study the influence of an external magnetic field on deconfinement transition in two-flavor lattice QCD with physical quark charges. use dynamical overlap fermions without any approximation such as fixed topology and perform simulations a ${16}^{3}\ifmmode\times\else\texttimes\fi{}6$ at pion mass around 500 MeV. The (as well spacing) was determined independent runs ${12}^{3}\ifmmode\times\else\texttimes\fi{}24$ lattices. consider two temperatures, one which is close to other above. Within...
We study the scaling behavior and finite (physical) volume effects as well Gribov copy dependence of SU(2) Landau gauge gluon propagator on lattice. Our physical lattice sizes range from $(3.0 \mathrm{fm})^4$ to $(7.3 \mathrm{fm})^4$. Considering lattices with decreasing spacing but fixed we confirm (non-perturbative) multiplicative renormalizability approach {\it continuum limit} for renormalized $D_{ren}(p)$ at momenta $|p| \ageq 0.6$ GeV >. The finite-volume influence turn out small in...
The behavior of the Landau gauge gluon and ghost propagators is studied in pure $SU(3)$ theory at nonzero temperature on lattice. We concentrate momentum range (0.6, 2.0) GeV. For longitudinal as well for transverse component propagator we extract continuum limit. demonstrate smallness finite-size Gribov-copy effects temperatures close to deconfinement phase transition $T={T}_{c}$ within restricted momenta. Since ${D}_{L}(q)$ turns out be most sensitive with respect transition, propose some...
For the gluon propagator of pure $SU(2)$ lattice gauge theory in Landau we investigate effect Gribov copies and finite-volume effects. Concerning fixing, enlarge accessible orbits by adding nonperiodic $\mathbb{Z}(2)$ transformations systematically employ simulated annealing algorithm. Strategies to keep all sectors under control within reasonable CPU time are discussed. We demonstrate that effects infrared regime become ameliorated. Reaching a physical volume about $(6.5\text{ }\text{...
For $SU(2)$ lattice gauge theory, we study numerically the infrared behavior of Landau-gauge ghost and gluon propagators with a special accent on Gribov copy dependence. Applying very efficient gauge-fixing procedure generating up to 80 copies, find that effect for both is essential in infrared. In particular, our best dressing function propagator approaches plateau infrared, while random first it continues grow. Our zero-momentum shows tendency decrease growing size, which excludes singular...
A bstract In this paper we study the interactions among a static quark-antiquark pair in presence of dense two-color quark matter with lattice simulation. To end compute Polyakov line correlation functions and determine renormalized color averaged, singlet triplet grand potentials. The potential allows us to elucidate number quarks induced by antiquark source, as well internal energy such matter. We furthermore screening length, which confinement phase is synonymous string breaking distance....
We study the Roberge-Weiss phase transition numerically. The is associated with discontinuities in quark-number density at specific values of imaginary quark chemical potential. parameterize number $\rho_q$ by polynomial fit function to compute canonical partition functions. demonstrate that this approach provides a good framework for analyzing lattice QCD data finite and high temperature. show numerically temperature, Lee-Yang zeros lie on negative real semi-axis provided high-quark-number...
We study lattice two-color QCD with two flavors of staggered fermions at imaginary and real quark chemical potential <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>μ</a:mi><a:mi>q</a:mi></a:msub></a:math> <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>T</c:mi><c:mo>></c:mo><c:msub><c:mi>T</c:mi><c:mi>c</c:mi></c:msub></c:math>. employ various methods extrapolation the number density from to potentials <e:math...
The critical temperature and the nature of QCD finite phase transition are determined for ${N}_{f}=2$ dynamical flavors nonperturbatively improved Wilson fermions. calculations performed on large lattices with temporal extents ${N}_{t}=12$, 10, 8, lattice spacings down to $a=0.075\text{ }\text{ }\mathrm{fm}$. We find that deconfinement chiral transitions take place at same temperature. Our results in broad agreement a second order limit. physical quark mass is found be...
We study the distribution of color electric flux three-quark system in quenched and full QCD (with ${N}_{f}=2$ flavors dynamical quarks) at zero finite temperature. To reduce ultraviolet fluctuations, calculations are done Abelian projected theory fixed to maximally gauge. In confined phase we find clear evidence for a $\mathrm{Y}$-shape tube surrounded formed by solenoidal monopole current, accordance with dual superconductor picture confinement. deconfined, high temperature monopoles cease...
We study the properties of configurations from which P-vortices on one hand or Abelian monopoles other have been removed. find that zero modes and band nonzero close to disappear spectrum overlap Dirac operator, confirming absence topological charge quark condensate. The different behavior modified ensembles under smearing compared unmodified Monte Carlo ensemble corroborates these findings. gluonic susceptibility rapidly approaches in accordance with ${Q}_{\mathrm{index}}=0$. remaining...
We study numerically the SU(2) Landau gauge transverse and longitudinal gluon propagators at nonzero temperatures $T$ both in confinement deconfinement phases. Special attention is paid to Gribov copy effects IR region. Applying a powerful fixing algorithm, we find that for propagator ${D}_{T}(p)$ are very strong infrared, while ${D}_{L}(p)$ shows weak (if any) dependence. The value ${D}_{T}(0)$ tends decrease with growing lattice size; however, infinite volume limit, disagreement suggestion...
We propose and test a new approach to computation of canonical partition functions in lattice QCD at finite density. suggest few steps procedure. first compute numerically the quark number density for imaginary chemical potential $i{\ensuremath{\mu}}_{qI}$. Then we restore grand function using fitting procedure Finally high precision numerical Fourier transformation. Additionally known method hopping parameter expansion compare results obtained by two methods deconfining as well confining...
The canonical approach, which was developed for solving the sign problem, may suffer from a new type of problem. In grand partition function is written as fugacity expansion: $Z_G(\mu,T) = \sum_n Z_C(n,T) \xi^n$, where $\xi=\exp(\mu/T)$ fugacity, and $Z_C(n,T)$ are given averages over Monte Carlo update, $\langle z_n\rangle$. We show that complex phase $z_n$ proportional to $n$ at each step. Although z_n\rangle$ take real positive values, values fluctuate rapidly when large, especially in...
We give a determination of the phenomenological value Wilson (or gradient) flow scales t0 and w0 for 2+1 flavours dynamical quarks. The simulations are performed keeping average quark mass constant, which allows approach to physical point be made in controlled manner. O(a) improved clover fermions used together with four lattice spacings this continuum extrapolation taken.
We report Lee-Yang zeros behavior at finite temperature and density. The quark number densities, 〈n〉, are calculated the pure imaginary chemical potential iμqI, where no sign problem occurs. Then, canonical partition functions, ZC(n,T,V), up to some maximal values of n estimated through fitting theoretically motivated functions which used compute zeros. study dependence distributions around pseudo-critical region T/Tc=0.84-1.35. In zeros, we observe Roberge-Weiss phase transition T/Tc≥1.20....
A bstract In this paper we study the confinement/deconfinement transition in lattice SU(2) QCD at finite quark density and zero temperature. The simulations are performed on an 32 4 with rooted staggered fermions a spacing = 0.044 fm. This small allowed us to reach very large baryon (up chemical potential μ q > 2000 MeV) avoiding strong artifacts. region ∼ 1000 MeV observe for first time which manifests itself rising of Polyakov loop vanishing string tension σ . After deconfinement is...