Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Rubtsov, Alexey N."'
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
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
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.
The impact of leading collective electronic fluctuations on a free energy of a prototype 1D model for molecular systems is considered within the recently developed Fluctuating Local Field (FLF) approach. The FLF method is a non-perturbative extension
Externí odkaz:
http://arxiv.org/abs/2104.02450
Dynamical mean field theory (DMFT) is used to study neutron matter, both with and without admixture of the proton fraction. The system is approximated by the lattice Habbard model. The corresponding equation of state as a function of temperature/dens
Externí odkaz:
http://arxiv.org/abs/2009.07127
Autor:
Brener, Sergey, Stepanov, Evgeny A., Rubtsov, Alexey N., Katsnelson, Mikhail I., Lichtenstein, Alexander I.
We present a purely diagrammatic derivation of the dual fermion scheme [Phys. Rev. B 77 (2008) 033101]. The derivation makes particularly clear that a similar scheme can be developed for an arbitrary reference system provided it has the same interact
Externí odkaz:
http://arxiv.org/abs/2007.15937
Publikováno v:
Phys. Rev. B 102, 224423 (2020)
We establish a way to handle main collective fluctuations in correlated quantum systems based on a Fluctuation Local Field concept. This technique goes beyond standard mean-field approaches, such as Hartree-Fock and dynamical mean-field theories (DMF
Externí odkaz:
http://arxiv.org/abs/2007.12534
Publikováno v:
Nanophotonics, Vol 12, Iss 14, Pp 2905-2911 (2023)
Coherent control of quantum systems with phase-stable pulses offers enticing new opportunities for lightwave electronics. Here we extend this approach to many-body systems with spin degrees of freedom, demonstrating that a single few-cycle control pu
Externí odkaz:
https://doaj.org/article/7ce46b8b9ec244ed8b26db1c8b93bded
We present a stochastic approach for the description of the quantum dynamics of open system in a fermionic environment (bath). The full quantum evolution as provided by the Schrodinger equation is reformulated exactly as a probabilistic average over
Externí odkaz:
http://arxiv.org/abs/1909.05760