Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Brener, Sergey"'
Autor:
Witt, Niklas, Nomura, Yusuke, Brener, Sergey, Arita, Ryotaro, Lichtenstein, Alexander I., Wehling, Tim O.
Superconductivity emerges from the spatial coherence of a macroscopic condensate of Cooper pairs. Increasingly strong binding and localization of electrons into these pairs compromises the condensate's phase stiffness, thereby limiting critical tempe
Externí odkaz:
http://arxiv.org/abs/2310.09063
Autor:
Schobert, Arne, Berges, Jan, van Loon, Erik G. C. P., Sentef, Michael A., Brener, Sergey, Rossi, Mariana, Wehling, Tim O.
Publikováno v:
SciPost Phys. 16, 046 (2024)
The interplay of electronic and nuclear degrees of freedom presents an outstanding problem in condensed matter physics and chemistry. Computational challenges arise especially for large systems, long time scales, in nonequilibrium, or in systems with
Externí odkaz:
http://arxiv.org/abs/2303.07261
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 101, 045119 (2020)
We present an infinite-dimensional lattice of two-by-two plaquettes, the quadruple Bethe lattice, with Hubbard interaction and solve it exactly by means of the cluster dynamical mean-field theory. It exhibits a $d$-wave superconducting phase that is
Externí odkaz:
http://arxiv.org/abs/1905.12610
Autor:
Bagrov, Andrey A., Danilov, Mikhail, Brener, Sergey, Harland, Malte, Lichtenstein, Alexander I., Katsnelson, Mikhail I.
A considerable success in phenomenological description of high-T$_{\rm c}$ superconductors has been achieved within the paradigm of Quantum Critical Point (QCP) - a parental state of a variety of exotic phases that is characterized by dense entanglem
Externí odkaz:
http://arxiv.org/abs/1904.11463
Publikováno v:
Phys. Rev. B 100, 024510 (2019)
We derive an expression for the effective Josephson coupling from the microscopic Hubbard model. It serves as a starting point for the description of phase fluctuations of local Cooper pairs in $d_{x^2-y^2}$-wave superconductors in the framework of a
Externí odkaz:
http://arxiv.org/abs/1810.12986
Akademický článek
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Autor:
Jung, Christoph, Wilhelm, Aljoscha, Hafermann, Hartmut, Brener, Sergey, Lichtenstein, Alexander
In this article we formulate the superperturbation theory for the Anderson impurity model on the real axis. The resulting impurity solver allows to evaluate dynamical quantities without numerical analytical continuation by the maximum entropy method
Externí odkaz:
http://arxiv.org/abs/1102.3279
Autor:
Hafermann, Hartmut, Jung, Christoph, Brener, Sergey, Katsnelson, Mikhail I., Rubtsov, Alexei N., Lichtenstein, Alexander I.
Publikováno v:
EPL 85, 27007 (2009)
We present a very efficient solver for the general Anderson impurity problem. It is based on the perturbation around a solution obtained from exact diagonalization using a small number of bath sites. We formulate a perturbation theory which is valid
Externí odkaz:
http://arxiv.org/abs/0809.1051
Akademický článek
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