Dilute Bose gas in classical environment at low temperatures

TL;DR

This paper investigates how a classical environment with non-Gaussian quenched disorder affects the ground-state and superfluid properties of a dilute Bose gas at low temperatures, using perturbation theory.

Contribution

It introduces a detailed analysis of a dilute Bose gas immersed in a classical bath with non-interacting particles, focusing on the impact of disorder on its thermodynamic and superfluid properties.

Findings

Disorder influences the ground-state energy and superfluid density.

Perturbation theory reveals significant environmental effects at second order.

The study provides insights into the interplay between disorder and superfluidity in Bose gases.

Abstract

The properties of a dilute Bose gas with the non-Gaussian quenched disorder are analysed. Being more specific we have considered a system of bosons immersed in the classical bath consisting of the non-interacting particles with infinite mass. Making use of perturbation theory up to second order we have studied the impact of environment on the ground-state thermodynamic and superfluid characteristics of the Bose component.