Boson-controlled quantum transport

TL;DR

This paper introduces a new model to analyze quantum transport influenced by bosonic fluctuations, revealing detailed insights into optical conductivity, spectral functions, and correlations in a 1D system.

Contribution

It presents a novel theoretical framework that captures key transport mechanisms involving bosonic interactions, with exact calculations for a 1D infinite system.

Findings

Exact calculation of optical conductivity and Drude weight

Analysis of spectral functions and groundstate dispersion

Insights into particle-boson correlations

Abstract

We study the interplay of collective dynamics and damping in the presence of correlations and bosonic fluctuations within the framework of a newly proposed model, which captures the principal transport mechanisms that apply to a variety of physical systems. We establish close connections to the transport of lattice and spin polarons, or the dynamics of a particle coupled to a bath. We analyse the model by exactly calculating the optical conductivity, Drude weight, spectral functions, groundstate dispersion and particle-boson correlation functions for a 1D infinite system.