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arXiv · 2205.13813

Nonequilibrium Two-Particle Self-Consistent Approach

Olivier Simard·Philipp Werner
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Abstract

We present the nonequilibrium implementation of the two-particle self-consistent (TPSC) approach, which has been shown to provide a reliable equilibrium description of interacting lattice systems in the weak- and intermediate-correlation regime. This method captures the effects of local and nonlocal correlations in two- and higher-dimensional systems and satisfies the Mermin-Wagner theorem. We demonstrate the versatility of nonequilibrium TPSC with calculations of the time-dependent spin and charge response functions and the evolution of effective temperatures extracted from different correlation functions, after interaction ramps in the two-dimensional Hubbard model.

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Olivier Simard, Philipp Werner. 2022-05-27. Nonequilibrium Two-Particle Self-Consistent Approach. https://doi.org/10.1103/physrevb.106.l241110

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