Criticality and Correlations in Cold Atomic Gases

  • Michael Köhl
  • Tobias Donner
  • Stephan Ritter
  • Thomas Bourdel
  • Anton Öttl
  • Ferdinand Brennecke
  • Tilman Esslinger
Part of the Advances in Solid State Physics book series (ASSP, volume 47)

Abstract

We study the phase transition of Bose—Einstein condensation in a dilute atomic gas very close to the critical temperature. The critical regime we enter is governed by fluctuations extending far beyond the length scale of thermal de-Broglie waves. Using matter-wave interference we measure the correlation length of these critical fluctuations as a function of temperature. From this we determine the critical exponent of the correlation length for a trapped, weakly interacting Bose gas to be v = 0.67 ± 0.13.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Michael Köhl
    • 1
    • 2
  • Tobias Donner
    • 1
  • Stephan Ritter
    • 1
  • Thomas Bourdel
    • 1
    • 3
  • Anton Öttl
    • 1
    • 4
  • Ferdinand Brennecke
    • 1
  • Tilman Esslinger
    • 1
  1. 1.Institute for Quantum ElectronicsETH ZürichZürichSwitzerland
  2. 2.Department of PhysicsUniversity of CambridgeCambridgeUK
  3. 3.Laboratoire Charles Fabry de l’institut d’Optique, CNRSUniv Paris-SudPalaiseau cedexFrance
  4. 4.Department of PhysicsUniversity of CaliforniaBerkeleyUSA

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