Revisiting the Hanbury Brown-Twiss Setup for Phase Fluctuating Bose Gases

TL;DR

This paper analyzes the formation of stripes in phase fluctuating Bose-Einstein condensates using the Hanbury Brown-Twiss setup, predicting their presence in quasi-1D gases and proposing measurement methods via axial two-point correlation functions.

Contribution

It revisits the Hanbury Brown-Twiss experiment to analyze phase fluctuations and predicts stripe formation in quasi-1D Bose gases, suggesting experimental measurement techniques.

Findings

Stripes form in phase fluctuating Bose-Einstein condensates.

Stripe presence predicted in quasi-1D Bose gases.

Proposes measuring stripes using axial two-point correlation functions.

Abstract

The Hanbury Brown-Twiss experiment has proved to be an effective means of measuring two-point correlation function of identical particles. We analyze experimental observation of stripes formation of a phase fluctuating Bose-Einstein condensates in a highly elongated 3D traps [Dettmer {\em et al.}, Phys. Rev. Lett. {\bf 87}, 160406 (2001)] by means of axial two-point correlation functions. We also predict that the stripes are present in quasi-1D Bose gas in the mean-field as well as in the hard-core bosons regimes. These stripes can be realized by measuring the axial two-point correlation functions by using the Bragg interferometric method which is similar to the original Hanbury Brown and Twiss experimental setup.