Phase fluctuations in Bose-Einstein condensates

Research output: Contribution to journal › Article › Research › peer review

Authors

  • D. Hellweg
  • S. Dettmer
  • P. Ryytty
  • J. J. Arlt
  • W. Ertmer
  • K. Sengstock
  • D. S. Petrov
  • G. V. Shlyapnikov
  • H. Kreutzmann
  • L. Santos
  • M. Lewenstein

Research Organisations

External Research Organisations

  • Universität Hamburg
  • FOM Institute for Atomic and Molecular Physics - AMOLF
  • Russian Research Centre Kurchatov Institute
  • Sorbonne Université
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Details

Original languageEnglish
Pages (from-to)781-789
Number of pages9
JournalApplied Physics B: Lasers and Optics
Volume73
Issue number8
Publication statusPublished - 23 Nov 2001

Abstract

We demonstrate the existence of phase fluctuations in elongated Bose-Einstein condensates (BECs) and study the dependence of these fluctuations on the system parameters. A strong dependence on temperature, atom number, and trapping geometry is observed. Phase fluctuations directly affect the coherence properties of BECs. In particular, we observe instances where the phase-coherence length is significantly smaller than the condensate size. Our method of detecting phase fluctuations is based on their transformation into density modulations after ballistic expansion. An analytic theory describing this transformation is developed.

ASJC Scopus subject areas

Cite this

Phase fluctuations in Bose-Einstein condensates. / Hellweg, D.; Dettmer, S.; Ryytty, P. et al.
In: Applied Physics B: Lasers and Optics, Vol. 73, No. 8, 23.11.2001, p. 781-789.

Research output: Contribution to journal › Article › Research › peer review

Hellweg, D, Dettmer, S, Ryytty, P, Arlt, JJ, Ertmer, W, Sengstock, K, Petrov, DS, Shlyapnikov, GV, Kreutzmann, H, Santos, L & Lewenstein, M 2001, 'Phase fluctuations in Bose-Einstein condensates', Applied Physics B: Lasers and Optics, vol. 73, no. 8, pp. 781-789. https://doi.org/10.1007/s003400100747
Hellweg, D., Dettmer, S., Ryytty, P., Arlt, J. J., Ertmer, W., Sengstock, K., Petrov, D. S., Shlyapnikov, G. V., Kreutzmann, H., Santos, L., & Lewenstein, M. (2001). Phase fluctuations in Bose-Einstein condensates. Applied Physics B: Lasers and Optics, 73(8), 781-789. https://doi.org/10.1007/s003400100747
Hellweg D, Dettmer S, Ryytty P, Arlt JJ, Ertmer W, Sengstock K et al. Phase fluctuations in Bose-Einstein condensates. Applied Physics B: Lasers and Optics. 2001 Nov 23;73(8):781-789. doi: 10.1007/s003400100747
Hellweg, D. ; Dettmer, S. ; Ryytty, P. et al. / Phase fluctuations in Bose-Einstein condensates. In: Applied Physics B: Lasers and Optics. 2001 ; Vol. 73, No. 8. pp. 781-789.
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T1 - Phase fluctuations in Bose-Einstein condensates

AU - Hellweg, D.

AU - Dettmer, S.

AU - Ryytty, P.

AU - Arlt, J. J.

AU - Ertmer, W.

AU - Sengstock, K.

AU - Petrov, D. S.

AU - Shlyapnikov, G. V.

AU - Kreutzmann, H.

AU - Santos, L.

AU - Lewenstein, M.

PY - 2001/11/23

Y1 - 2001/11/23

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DO - 10.1007/s003400100747

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