Work

Steady-state dynamical mean field theory based on influence functional matrix product states

Year: 2025

Type: article

Abstract: We implement the recently developed influence functional matrix product states approach as impurity solver in equilibrium and nonequilibrium dynamical mean field theory (DMFT) calculations of the single-band Hubbard model. The method yields numerically exact descriptions of metallic states without sharp spectral features, at a moderate numerical cost. Systems with narrow quasiparticle or spin-polaron peaks, as well as low-temperature Mott insulators provide more challenges, since these simulations require long time contours or high bond dimensions. A promising field of application is the DMFT simulation of nonequilibrium steady states, which we demonstrate with results for photo-doped Mott systems with long-lived doublon and holon populations.

Source: Physical review. B./Physical review. B

DOI: 10.1103/xsbn-jk16

Authors: Mithilesh Nayak, Julian Thoenniss, Michael Sonner, Dmitry A. Abanin, Philipp Werner

Institutions: University of Fribourg, University of Geneva, Max Planck Institute for the Physics of Complex Systems, Princeton University, École Polytechnique Fédérale de Lausanne

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Université de Fribourg, European Research Council

Awards: G3629934305, Correlated multi-orbital lattice systems