Phys. Rev. A 68, 053612 (2003) [10 pages]Second-order correlation function of a phase fluctuating Bose-Einstein condensate
L. Cacciapuoti *, D. Hellweg, M. Kottke, T. Schulte, W. Ertmer, and J. J. Arlt
K. Sengstock
L. Santos and M. Lewenstein Received 8 July 2003; published 20 November 2003 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. ©2003 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevA.68.053612 * Present address: BNM-SYRTE, Observatoire de Paris, 61 Avenue de l’Observatoire, 75014 Paris, France. Email address: Luigi.Cacciapuoti@obspm.fr [ Abstract | Previous article | Next article | Issue 5 ] |
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