38 citations · 76 across the 2 of their papers we have counts for
12 papers · 1 filter
Impact of partially bosonized collective fluctuations on electronic degrees of freedom
V. Harkov, M. Vandelli, S. Brener +2
In this work we present a comprehensive analysis of collective electronic fluctuations and their effect on single-particle properties of the Hubbard model. Our approach is based on…
Dual fermion method as a prototype of generic reference-system approach for correlated fermions
Sergey Brener, Evgeny A. Stepanov, Alexey N. Rubtsov +2
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 develop…
Collective magnetic fluctuations in Hubbard plaquettes captured by fluctuating local field method
Alexey N. Rubtsov, Evgeny A. Stepanov, Alexander I. Lichtenstein
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 a…
Dual Boson Diagrammatic Monte Carlo Approach Applied to the Extended Hubbard Model
M. Vandelli, V. Harkov, E. A. Stepanov +4
In this work we introduce the Dual Boson Diagrammatic Monte Carlo technique for strongly interacting electronic systems. This method combines the strength of dynamical mean-filed t…
Tracking the Footprints of Spin Fluctuations: A MultiMethod, MultiMessenger Study of the Two-Dimensional Hubbard Model
Thomas Schäfer, Nils Wentzell, Fedor Šimkovic +23
The Hubbard model represents the fundamental model for interacting quantum systems and electronic correlations. Using the two-dimensional half-filled Hubbard model at weak coupling…
Consistent partial bosonization of the extended Hubbard model
E. A. Stepanov, V. Harkov, A. I. Lichtenstein
We design an efficient and balanced approach that captures major effects of collective electronic fluctuations in strongly correlated fermionic systems using a simple diagrammatic…