55 citations · 161 across the 12 of their papers we have counts for
12 papers
A microscopic theory of Anderson localization of electrons in random lattices
Václav Janiš
The existence of Anderson localization, characterized by vanishing diffusion due to strong disorder, has been demonstrated in numerous ways. A systematic approach based on the Ande…
Failure of the Baym-Kadanoff construction to match consistently quantum dynamics with thermodynamic critical behavior
Václav Janiš, Vladislav Pokorný, Šimon Kos
We disclose a serious deficiency of the Baym-Kadanoff construction of thermodynamically consistent conserving approximations. There are two vertices in this scheme: dynamical and c…
Green functions in the renormalized many-body perturbation theory
Václav Janiš
I review the way the many-body Green functions are used to renormalize the perturbation theory of correlated fermions. The Green functions are introduced to implement systematicall…
Dynamical Mean-Field Theory of Disordered Electrons: Coherent Potential Approximation and Beyond
Václav Janiš
I review the quantum theory of the electron moving in a random environment. First, the quantum mechanics of individual particles scattered on a random potential is discussed. The q…
Curie-Weiss susceptibility in strongly correlated electron systems
Václav Janiš, Antonín Klíč, Jiawei Yan +1
The genesis of the Curie-Weiss magnetic response observed in most transition metals that are Fermi liquids at low temperatures has been an enigma for decades and has not yet been f…
Kondo Temperature and High to Low Temperature Crossover in Quantum Dots
Václav Janiš, Antonín Klíč
Kondo temperature is standardly defined from the local zero-temperature susceptibility in the regime of strong electron correlations as a new scale controlling the low-temperature…
Strongly correlated electrons: Analytic mean-field theories with two-particle self-consistency
Václav Janiš, Peter Zalom, Vladislav Pokorný +1
A two-particle self-consistency is rarely part of mean-field theories. It is, however, essential for avoiding spurious critical transitions and unphysical behavior. We present a ge…
Mean-field approximation for thermodynamic and spectral functions of correlated electrons: Strong-coupling and arbitrary band filling
Václav Janiš, Vladislav Pokorný, Anna Kauch
We present a construction of a mean-field theory for thermodynamic and spectral properties of correlated electrons reliable in the strong-coupling limit. We introduce an effective…
Josephson-phase-controlled interplay between correlation effects and electron pairing in a three-terminal nanostructure
Tadeusz Domański, Martin Žonda, Vladislav Pokorný +3
We study the subgap spectrum of the interacting single-level quantum dot coupled between two superconducting reservoirs, forming the Josephson-type circuit, and additionally hybrid…
Thermodynamically consistent description of criticality in models of correlated electrons
Václav Janiš, Anna Kauch, Vladislav Pokorný
Criticality in models of correlated electrons emerges in proximity of a low-temperature singularity in a two-particle Green function. Such singularities are generally related to a…
Perturbation theory for an Anderson quantum dot asymmetrically attached to two superconducting leads
Martin Žonda, Vladislav Pokorný, Václav Janiš +1
Self-consistent perturbation expansion up to the second order in the interaction strength is used to study a single-level quantum dot with local Coulomb repulsion attached asymmetr…
Introduction to Mean-Field Theory of Spin Glass Models
Václav Janiš
We discuss the mean-field theory of spin-glass models with frustrated long-range random spin exchange. We analyze the reasons for breakdown of the simple mean-field theory of Sherr…