Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Ulybyshev, M."'
The Callan-Harvey mechanism in 2+1 D Jackiw-Rebbi model is revisited. We analyzed Callan-Harvey anomaly inflow in the massive Chern insulator (quantum anomalous Hall system) subject to external electric field. In addition to the conventional current
Externí odkaz:
http://arxiv.org/abs/2305.00575
Autor:
Ulybyshev, M. V., Valgushev, S. N.
The concept of Lefschetz thimble decomposition is one of the most promising possible modifications of Quantum Monte Carlo (QMC) algorithms aimed at alleviating the sign problem which appears in many interesting physical situations, e.g. in the Hubbar
Externí odkaz:
http://arxiv.org/abs/1712.02188
The detection of the (semi)metal-insulator phase transition can be extremely difficult if the local order parameter which characterizes the ordered phase is unknown.In some cases, it is even impossible to define a local order parameter: the most prom
Externí odkaz:
http://arxiv.org/abs/1710.06675
Publikováno v:
Phys. Rev. B 97, 035102 (2018)
In this paper the interaction potential between static charges in suspended graphene is studied within the quantum Monte Carlo approach. We calculated the dielectric permittivity of suspended graphene for the set of temperatures and extrapolated our
Externí odkaz:
http://arxiv.org/abs/1709.08964
Publikováno v:
Phys. Rev. Lett. 118, 266801 (2017)
We have developed a Hartree-Fock theory for electrons on a honeycomb lattice aiming to solve a long-standing problem of the Fermi velocity renormalization in graphene. Our model employs no fitting parameters (like an unknown band cutoff) but relies o
Externí odkaz:
http://arxiv.org/abs/1704.03747
Autor:
Buividovich, P. V., Ulybyshev, M. V.
Publikováno v:
Int. J. Mod. Phys. A 31, 1643008 (2016)
We review the application of lattice QCD techniques, most notably the Hybrid Monte-Carlo (HMC) simulations, to first-principle study of tight-binding models of crystalline solids with strong inter-electron interactions. After providing a basic introd
Externí odkaz:
http://arxiv.org/abs/1602.08431
Publikováno v:
Phys. Rev. B 94, 085421 (2016)
Optical conductivity of graphene is studied using Quantum Monte Carlo calculations. We start from Euclidean current-current correlator and extract $\sigma (\omega)$ from Green-Kubo relations using Backus-Gilbert method. Calculations were performed bo
Externí odkaz:
http://arxiv.org/abs/1601.05315
Autor:
Buividovich, P. V., Ulybyshev, M. V.
Publikováno v:
Phys. Rev. D 94, 025009 (2016)
We report on a numerical study of real-time dynamics of electromagnetically interacting chirally imbalanced lattice Dirac fermions within the classical statistical field theory approach. Namely, we perform exact simulations of the real-time quantum e
Externí odkaz:
http://arxiv.org/abs/1509.02076
Autor:
Ulybyshev, M. V., Katsnelson, M. I.
Publikováno v:
Phys. Rev. Lett. 114, 246801 (2015)
We study electronic properties of graphene with finite concentration of vacancies or other resonant scatterers by a straightforward lattice Quantum Monte Carlo calculations. Taking into account realistic long-range Coulomb interaction we calculate di
Externí odkaz:
http://arxiv.org/abs/1502.01184
Publikováno v:
Phys. Rev. E 92, 032602 (2015)
The phase structure of a homopolymer chain is investigated in terms of a universal theoretical model, designed to describe the infrared limit of slow spatial variations. The effects of chirality are studied and compared with the influence of a short-
Externí odkaz:
http://arxiv.org/abs/1501.05267