Momentum Spectroscopy of 1D Phase Fluctuations in Bose-Einstein Condensates

S. Richard, F. Gerbier, J. H. Thywissen, M. Hugbart, P. Bouyer, and A. Aspect
Phys. Rev. Lett. 91, 010405 – Published 3 July 2003

Abstract

We measure the axial momentum distribution of Bose-Einstein condensates with an aspect ratio of 152 using Bragg spectroscopy. We observe the Lorentzian momentum distribution characteristic of one-dimensional phase fluctuations. The temperature dependence of the width of this distribution provides a quantitative test of quasicondensate theory. In addition, we observe a condensate length consistent with the suppression of density fluctuations, even when phase fluctuations are large.

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  • Received 7 March 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.010405

©2003 American Physical Society

Authors & Affiliations

S. Richard, F. Gerbier, J. H. Thywissen*, M. Hugbart, P. Bouyer, and A. Aspect

  • Laboratoire Charles Fabry de l’Institut d’Optique, UMR 8501 du CNRS, 91403 Orsay Cedex, France

  • *Current address: Department of Physics, University of Toronto, Canada.

See Also

Measurement of the Spatial Correlation Function of Phase Fluctuating Bose-Einstein Condensates

D. Hellweg, L. Cacciapuoti, M. Kottke, T. Schulte, K. Sengstock, W. Ertmer, and J. J. Arlt
Phys. Rev. Lett. 91, 010406 (2003)

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Vol. 91, Iss. 1 — 4 July 2003

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