Revealing single-trap condensate fragmentation by measuring density-density correlations after time of flight

We consider ultracold bosonic atoms in a single trap in the Thomas-Fermi regime, forming many-body states corresponding to stable macroscopically fragmented two-mode condensates. It is demonstrated that upon free expansion of the gas, the spatial dependence of the density-density correlations at lat...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2014-09
Main Authors: Myung-Kyun Kang, Fischer, Uwe R
Format: Article
Language:English
Subjects:
Condensates
Correlation analysis
Density
Dependence
Fragmentation
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We consider ultracold bosonic atoms in a single trap in the Thomas-Fermi regime, forming many-body states corresponding to stable macroscopically fragmented two-mode condensates. It is demonstrated that upon free expansion of the gas, the spatial dependence of the density-density correlations at late times provides a unique signature of fragmentation. This hallmark of fragmented condensate many-body states in a single trap is due to the fact that time of flight modifies the correlation signal such that two opposite %with respect to points in the expanding cloud become uncorrelated, in distinction to a nonfragmented Bose-Einstein condensate, where they remain correlated.
ISSN:2331-8422
DOI:10.48550/arxiv.1405.1344