447 citations · 1.6k across the 27 of their papers we have counts for
17 papers · 1 filter
Fluctuation diagnostics of the finite temperature quasi-antiferromagnetic regime of the 2D Hubbard model
Behnam Arzhang, A. E. Antipov, J. P. F. LeBlanc
We study the finite temperature Fermi-liquid to non-Fermi-liquid crossover in the 2D Hubbard model for a range of dopings using the self-consistent ladder dual fermion method. We c…
Magnetic Susceptibility and Simulated Neutron Signal in the 2D Hubbard Model
J. P. F. LeBlanc, Shaozhi Li, Xi Chen +4
We compute dynamic spin susceptibilities in the two-dimensional Hubbard model using the method of Dual Fermions and provide comparison to lattice Monte Carlo and cluster dynamical…
Spreading of correlations in the Falicov-Kimball model
Andreas J. Herrmann, Andrey E. Antipov, Philipp Werner
We study dynamical properties of the one- and two-dimensional Falicov-Kimball model using lattice Monte Carlo simulations. In particular, we calculate the spreading of charge corre…
Quantum Monte Carlo solution of the dynamical mean field equations in real time
Qiaoyuan Dong, Igor Krivenko, Joseph Kleinhenz +3
We present real-time inchworm quantum Monte Carlo results for single-site dynamical mean field theory on an infinite coordination number Bethe lattice. Our numerically exact result…
Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory
G. Rohringer, H. Hafermann, A. Toschi +6
Strong electronic correlations pose one of the biggest challenges to solid state theory. We review recently developed methods that address this problem by starting with the local,…
Currents and Green's functions of impurities out of equilibrium -- results from inchworm Quantum Monte Carlo
Andrey E. Antipov, Qiaoyuan Dong, Joseph Kleinhenz +2
We generalize the recently developed inchworm quantum Monte Carlo method to the full Keldysh contour with forward, backward, and equilibrium branches to describe the dynamics of st…
Diagrammatic Monte Carlo for Dual Fermions
Sergei Iskakov, Andrey E. Antipov, Emanuel Gull
We introduce a numerical algorithm to stochastically sample the dual fermion perturbation series around the dynamical mean field theory, generating all topologies of two-particle i…
Interaction-tuned Anderson versus Mott localization
Andrey E. Antipov, Younes Javanmard, Pedro Ribeiro +1
Disorder or sufficiently strong interactions can render a metallic state unstable causing it to turn into an insulating one. Despite the fact that the interplay of these two routes…
Voltage quench dynamics of a Kondo system
Andrey E. Antipov, Qiaoyuan Dong, Emanuel Gull
We examine the dynamics of a correlated quantum dot in the mixed valence regime. We perform numerically exact calculations of the current after a quantum quench from equilibrium by…
opendf - an implementation of the dual fermion method for strongly correlated systems
Andrey E. Antipov, James P. F. LeBlanc, Emanuel Gull
The dual fermion method is a multiscale approach for solving lattice problems of interacting strongly correlated systems. In this paper, we present the \texttt{opendf} code, an ope…
Mechanisms of finite temperature magnetism in the three-dimensional Hubbard model
Daniel Hirschmeier, Hartmut Hafermann, Emanuel Gull +2
We examine the nature of the transition to the antiferromagnetically ordered state in the half-filled three-dimensional Hubbard model using the dual-fermion multiscale approach. Co…
Mott insulator breakdown through pattern formation
Pedro Ribeiro, Andrey E. Antipov, Alexey N. Rubtsov
We study the breakdown of a Mott insulator with the thermodynamic imbalance induced by an applied bias voltage. By analyzing the instabilities of the magnetic susceptibility, we de…
Modeling the metastable dynamics of correlated structures
Alexey M. Shakirov, Sergey V. Tsibulsky, Andrey E. Antipov +2
Metastable quantum dynamics of an asymmetric triangular cluster that is coupled to a reservoir is investigated. The dynamics is governed by bath-mediated transitions, which in part…
Critical Exponents of Strongly Correlated Fermion Systems from Diagrammatic Multi-Scale Methods
Andrey E. Antipov, Emanuel Gull, Stefan Kirchner
Self-consistent dynamical approximations for strongly correlated fermion systems are particularly successful in capturing the dynamical competition of local correlations. In these,…
Competing phases of the Hubbard model on a triangular lattice -- insights from the entropy
Gang Li, Andrey E. Antipov, Alexey N. Rubtsov +2
Based on the ladder dual-fermion approach, we present a comprehensive study of the phases of the isotropic Hubbard model on the triangular lattice. We find a rich phase diagram con…
Role of rotational symmetry in the magnetism of a multiorbital model
A. E. Antipov, I. S. Krivenko, V. I. Anisimov +2
Effect of rotationally-invariant Hund's rule coupling on a magnetism of multiorbital Hubbard models is studied within a dynamical mean field theory framework. Comparison of static…
Electron energy spectrum of the spin-liquid state in a frustrated Hubbard model
A. E. Antipov, A. N. Rubtsov, M. I. Katsnelson +1
Non-local correlation effects in the half-filled Hubbard model on an isotropic triangular lattice are studied within a spin polarized extension of the dual fermion approach. A comp…