38 citations · 76 across the 2 of their papers we have counts for
5 papers · 1 filter
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…
Nonlinear optical study of commensurability effects in graphene-hBN heterostructures
E. A. Stepanov, S. V. Semin, C. R. Woods +4
Second-order nonlinear optical response allows to detect different properties of the system associated with the inversion symmetry breaking. Here, we use a second harmonic generati…