Second Order Correlation Function of a Phase Fluctuating Bose-Einstein Condensate
摘要
The coherence properties of phase fluctuating Bose-Einstein condensates are studied both theoretically and experimentally. We derive a general expression for the N-particle correlation function of a condensed Bose gas in a highly elongated trapping potential. The second order correlation function is analyzed in detail and an interferometric method to directly measure it is discussed and experimentally implemented. Using a Bragg diffraction interferometer, we measure intensity correlations in the interference pattern generated by two spatially displaced copies of a parent condensate. Our experiment demonstrates how to characterize the second order correlation function of a highly elongated condensate and to measure its phase coherence length.
引用
@article{arxiv.cond-mat/0308135,
title = {Second Order Correlation Function of a Phase Fluctuating Bose-Einstein Condensate},
author = {L. Cacciapuoti and D. Hellweg and M. Kottke and T. Schulte and K. Sengstock and W. Ertmer and J. J. Arlt and L. Santos and M. Lewenstein},
journal= {arXiv preprint arXiv:cond-mat/0308135},
year = {2009}
}
备注
22 pages, 5 figures