Hanbury Brown Twiss effect for ultracold quantum gases
M. Schellekens, R. Hoppeler, A. Perrin, J. Viana Gomes, D. Boiron, A., Aspect, C. I. Westbrook
TL;DR
This paper investigates the Hanbury Brown Twiss effect in ultracold quantum gases, analyzing 2-body correlations in thermal and coherent atomic clouds to understand quantum statistical behaviors.
Contribution
It provides the first detailed three-dimensional measurements of the Hanbury Brown Twiss effect in ultracold gases, highlighting the dependence on cloud size and quantum state.
Findings
Thermal clouds exhibit bunching behavior in correlations.
Coherent samples show flat correlation functions.
Correlation dependence on cloud size is characterized.
Abstract
We have studied 2-body correlations of atoms in an expanding cloud above and below the Bose-Einstein condensation threshold. The observed correlation function for a thermal cloud shows a bunching behavior, while the correlation is flat for a coherent sample. These quantum correlations are the atomic analogue of the Hanbury Brown Twiss effect. We observe the effect in three dimensions and study its dependence on cloud size.
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