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6 papers · 1 filter
Adiabatic eigenstate deformations and weak integrability breaking of Heisenberg chain
Pavel Orlov, Anastasiia Tiutiakina, Rustem Sharipov +3
We consider the spin-1/2 XXX chain weakly perturbed away from integrability by an isotropic next-to-nearest neighbor exchange interaction. Recently, it was conjectured that this mo…
Dual parquet scheme for the two-dimensional Hubbard model: modelling low-energy physics of high- cuprates with high momentum resolution
G. V. Astretsov, G. Rohringer, A. N. Rubtsov
We present a new method to treat the two-dimensional (2D) Hubbard model for parameter regimes which are relevant for the physics of the high- superconducting cuprates. Unlike…
Role of three-particle vertex within dual fermion calculations
T. Ribic, P. Gunacker, S. Iskakov +5
We investigate the influence of self-energy diagrams beyond the two-particle vertex level within dual fermion theory. Specifically, we calculate the local three-particle vertex and…
Magnetostriction and ferroelectric state in AgCrS
Sergey V. Streltsov, Alexander I. Poteryaev, Alexey N. Rubtsov
The band structure calculations in the GGA+U approximation show the presence of additional lattice distortions in the magnetically ordered phase of AgCrS. The magnetostriction…
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…
Plasmons in strongly correlated systems: spectral weight transfer and renormalized dispersion
E. G. C. P. van Loon, H. Hafermann, A. I. Lichtenstein +2
We study the charge-density dynamics within the two-dimensional extended Hubbard model in the presence of long-range Coulomb interaction across the metal-insulator transition point…