Towards out of equilibrium impurity solver for the Dynamical Mean Field Theory
Strongly Correlated Electrons
2023-11-07 v1
Abstract
The Dynamical Mean Field Theory (DMFT) is a powerful tool for calculating highly correlated systems (both bosonic and fermionic) in a state of thermodynamic equilibrium. However, in the case of non-equilibrium states, the method has significant limitations that do not allow obtaining correct results. The stumbling block here is the impurity solver: a method for calculating the dynamics of an open system. In this work we present the prototype of a universal impurity solver for the DMFT method which can solve both equilibrium and non-equilibrium problems. We analyse spectral functions of Bose-Hubbard model on the Bethe lattice in different regimes and show that our solver gives correct and physical results.
Keywords
Cite
@article{arxiv.2311.02623,
title = {Towards out of equilibrium impurity solver for the Dynamical Mean Field Theory},
author = {A. Karpov and G. Sultanov and E. Polyakov and A. Rubtsov},
journal= {arXiv preprint arXiv:2311.02623},
year = {2023}
}