Finite-temperature trapped dipolar Bose gas

TL;DR

This paper develops a finite-temperature Hartree theory for trapped dipolar Bose gases, revealing how thermal effects influence stability and density oscillations, with results applicable to experimental and theoretical studies of quantum gases.

Contribution

The paper introduces a finite-temperature Hartree theory specifically for trapped dipolar Bose gases, extending understanding of thermal effects on stability and density oscillations.

Findings

Thermal effects enhance stability above the critical temperature.

Density oscillating condensate states occur over a broad range of interactions.

Thermal depletion explains behavior below the critical temperature.

Abstract

We develop a finite temperature Hartree theory for the trapped dipolar Bose gas. We use this theory to study thermal effects on the mechanical stability of the system and density oscillating condensate states. We present results for the stability phase diagram as a function of temperature and aspect ratio. In oblate traps above the critical temperature for condensation we find that the Hartree theory predicts significant stability enhancement over the semiclassical result. Below the critical temperature we find that thermal effects are well described by accounting for the thermal depletion of the condensate. Our results also show that density oscillating condensate states occur over a range of interaction strengths that broadens with increasing temperature.