Zobrazeno 1 - 10
of 305
pro vyhledávání: '"Rubtsov, A. N."'
We introduce regular series expansion for weakly- and moderately-correlated fermionic systems, based on Fluctuating Local Field approach. The method relies on the explicit account of leading fluctuating mode(s) and is therefore suitable for medium-si
Externí odkaz:
http://arxiv.org/abs/2406.12590
Autor:
Umanskii, M. V., Rubtsov, A. N.
Gaussian boson sampling (GBS) is considered a candidate problem for demonstrating quantum advantage. We propose an algorithm for approximate classical simulation of a lossy GBS instance. The algorithm relies on the Taylor series expansion, and increa
Externí odkaz:
http://arxiv.org/abs/2404.01004
We present a method to study the time evolution of the single impurity Anderson model which exploits a mean field decoupling of the interacting impurity and the non-interacting bath (in form of a chain). This is achieved by the introduction of a pair
Externí odkaz:
http://arxiv.org/abs/2403.13661
Autor:
Semenov, S., Rubtsov, A. N.
The Landau Free Energy determines the landscape of order parameter fluctuations that occur in a physical system at thermal equilibrium and, in particular, characterizes the critical phenomena. We propose a semi-analytical approach based on the Fluctu
Externí odkaz:
http://arxiv.org/abs/2310.12679
A system having macroscopic patches in different topological phases have no well-defined global topological invariant. To treat such a case, the quantities labeling different areas of the sample according to their topological state are used, dubbed l
Externí odkaz:
http://arxiv.org/abs/2304.13708
We present a method for computing thermal properties of classical spin clusters with arbitrarily chosen interactions between spins. For such systems, instability channels are \textit{a priori} not known. The method is based on the Fluctuating Local F
Externí odkaz:
http://arxiv.org/abs/2212.14733
Publikováno v:
Phys. Rev. B, Vol. 107, Iss. 9 - 1 March 2023, pages 094304
Short-time dynamics of many-body systems may exhibit non-analytical behavior of the systems' properties at particular times, thus dubbed dynamical quantum phase transition. Simulations showed that in the presence of disorder new critical times appear
Externí odkaz:
http://arxiv.org/abs/2211.14256
Autor:
Umanskii, M., Rubtsov, A. N.
When the problem of boson sampling was first proposed, it was assumed that little or no photon collisions occur. However, modern experimental realizations rely on setups where collisions are quite common, i.e. the number of photons $M$ injected into
Externí odkaz:
http://arxiv.org/abs/2209.00855
Robust zero modes supported by defects is one of the key features of topological matter. Its presence renders a system topologically inhomegeneuous, thus having no well-defined global topological invariant. The quantities labeling different areas of
Externí odkaz:
http://arxiv.org/abs/2112.13574
Autor:
Umanskii, Mikhail V.1 (AUTHOR) mix.umanskiy@yandex.ru, Rubtsov, Alexey N.1,2 (AUTHOR) ar@rqc.ru
Publikováno v:
Entropy. Jun2024, Vol. 26 Issue 6, p493. 15p.