Stability and phase coherence of trapped 1D Bose gases

TL;DR

This paper investigates the stability and phase coherence of one-dimensional trapped Bose gases, revealing that inelastic decay is suppressed in strongly interacting regimes, which is promising for experimental realization, but phase coherence diminishes with increased interactions.

Contribution

It provides new insights into the stability and phase coherence properties of 1D Bose gases across different interaction regimes, especially highlighting suppression of decay processes in strongly interacting regimes.

Findings

Inelastic decay processes are suppressed in strongly interacting regimes.

Phase coherence length decreases with increased interactions due to fermionization.

Full phase coherence at zero temperature occurs only in the weakly interacting regime.

Abstract

We discuss stability and phase coherence of 1D trapped Bose gases and find that inelastic decay processes, such as 3-body recombination, are suppressed in the strongly interacting (Tonks-Girardeau) and intermediate regimes. This is promising for achieving these regimes with a large number of particles. "Fermionization" of the system reduces the phase coherence length, and at T=0 the gas is fully phase coherent only deeply in the weakly interacting (Gross-Pitaevskii) regime.