Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Tikhonov, Konstantin S."'
Publikováno v:
Phys. Rev. B 108, 014203 - Published 17 July 2023
Anderson localization on random regular graphs (RRG) serves as a toy-model of many-body localization (MBL). We explore the transition for ergodicity to localization on RRG with large connectivity $m$. In the analytical part, we focus on the inverse p
Externí odkaz:
http://arxiv.org/abs/2302.06581
Using the framework of supersymmetric non-linear $\sigma$-model we develop a general non-perturbative characterisation of universal features of the density $\rho(\Gamma)$ of the imaginary parts (``width'') for $S$-matrix poles (``resonances'') descri
Externí odkaz:
http://arxiv.org/abs/2211.03376
Publikováno v:
In Annals of Physics January 2024 460
We study deterministic power-law quantum hopping model with an amplitude $J(r) \propto - r^{-\beta}$ and local Gaussian disorder in low dimensions $d=1,2$ under the condition $d < \beta < 3d/2$. We demonstrate unusual combination of exponentially dec
Externí odkaz:
http://arxiv.org/abs/2103.06001
Autor:
Pöpperl, Paul, Doggen, Elmer V. H., Karcher, Jonas F., Mirlin, Alexander D., Tikhonov, Konstantin S.
We explore dynamics of disordered and quasi-periodic interacting lattice models using a self-consistent time-dependent Hartree-Fock (TDHF) approximation, accessing both large systems (up to $L = 400$ sites) and very long times (up to $t = 10^5$). We
Externí odkaz:
http://arxiv.org/abs/2101.07018
Publikováno v:
Phys. Rev. B 103, 064204 (2021)
We explore correlations of eigenstates around the many-body localization (MBL) transition in their dependence on the energy difference (frequency) $\omega$ and disorder $W$. In addition to the genuine many-body problem, XXZ spin chain in random field
Externí odkaz:
http://arxiv.org/abs/2009.09685
We review recent progress in the theory of electromagnetic response of dirty superconductors subject to microwave radiation. The theory originally developed by Eliashberg in 1970 and soon after that elaborated in a number of publications addressed th
Externí odkaz:
http://arxiv.org/abs/1911.04959
Autor:
Westerhout, Tom, Astrakhantsev, Nikita, Tikhonov, Konstantin S., Katsnelson, Mikhail, Bagrov, Andrey A.
Publikováno v:
Nat Commun 11, 1593 (2020)
Neural quantum states (NQS) attract a lot of attention due to their potential to serve as a very expressive variational ansatz for quantum many-body systems. Here we study the main factors governing the applicability of NQS to frustrated magnets by t
Externí odkaz:
http://arxiv.org/abs/1907.08186
Autor:
Doggen, Elmer V. H., Schindler, Frank, Tikhonov, Konstantin S., Mirlin, Alexander D., Neupert, Titus, Polyakov, Dmitry G., Gornyi, Igor V.
Publikováno v:
Phys. Rev. B 98, 174202 (2018)
We theoretically study the quench dynamics for an isolated Heisenberg spin chain with a random on-site magnetic field, which is one of the paradigmatic models of a many-body localization transition. We use the time-dependent variational principle as
Externí odkaz:
http://arxiv.org/abs/1807.05051
Publikováno v:
Scientific reports 8 (1), 16256 (2018)
We identify graphene layer on a disordered substrate as a possible system where Anderson localization of phonons can be observed. Generally, observation of localization for scattering waves is not simple, because the Rayleigh scattering is inversely
Externí odkaz:
http://arxiv.org/abs/1712.09608