Energy spectrum of pseudospin-electron model in the dynamical mean-field theory

TL;DR

This paper investigates the electron energy spectrum in the pseudospin-electron model using dynamical mean-field theory, exploring how interactions and fields influence subband structure and relating it to boson-fermion mixtures in optical lattices.

Contribution

It develops an alloy analogy approximation within DMFT for the pseudospin-electron model with infinite on-site repulsion, analyzing effects on the energy spectrum.

Findings

Interaction and fields affect the number of electron subbands.

The alloy analogy approximation is formulated within DMFT.

Connections to boson-fermion mixtures in optical lattices are discussed.

Abstract

The pseudospin-electron model in the case of infinite on-site electron repulsion is investigated. The electron energy spectrum is calculated within the framework of the dynamical mean field theory (DMFT), and the alloy analogy approximation is developed. The effect of the pseudospin-electron interaction, local asymmetry field, and tunneling-like level splitting on the existence and the number of electron subbands is investigated. The relation of the pseudospin-electron model to the problem of energy spectrum of boson-fermion mixtures in optical lattices is discussed.