Resonant transport of bosonic carriers through a quantum device

TL;DR

This paper investigates bosonic particle transport through a quantum chain connected to reservoirs, revealing resonant transmission phenomena for nearly condensed bosons at specific gate voltages, using semi-microscopic reservoir models.

Contribution

It introduces semi-microscopic reservoir models for bosonic transport, enabling analysis at arbitrary temperatures and uncovering resonant transmission effects.

Findings

Resonant transmission occurs at specific gate voltages.

Transport is significantly enhanced for nearly condensed bosons.

The model allows for arbitrary reservoir temperature analysis.

Abstract

We analyze the current of Bose particles across the tight-binding chain connected at both ends to the particles reservoirs. Unlike the standard open Bose-Hubbard model, where the presence of reservoirs is taken into account by the Lindbladians acting on the first and the last sites of the chain, we use the semi-microscopic models for the reservoirs. This allows us to address the case of arbitrary reservoir temperature. In particular, we discuss the phenomenon of the resonant transmission for nearly condensed bosons, where the current across the chain is significantly enhanced for certain values of the gate voltage.