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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 1, Iss. 10 — Nov. 10, 1997
  • pp: 284–292

Characterizing the coherence of Bose-Einstein condensates and atom lasers

R. J. Dodd, Charles W. Clark, Mark Edwards, and K. Burnett  »View Author Affiliations

Optics Express, Vol. 1, Issue 10, pp. 284-292 (1997)

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For a dilute, interacting Bose gas of magnetically-trapped atoms at temperatures below the critical temperature T0 for Bose-Einstein condensation, we determine the second-order coherence function g(2)(r1, r2) within the framework of a finite-temperature quantum field theory. We show that, because of the different spatial distributions of condensate and thermal atoms in the trap, g(2)(r1, r2) does not depend on |r1 - r2| alone. This means that the experimental determinations of g(2) reported to date give only its spatial average. Such an average may underestimate the degree of coherence attainable in an atom laser by judicious engineering of the output coupler.

© Optical Society of America

OCIS Codes
(020.7010) Atomic and molecular physics : Laser trapping
(030.1640) Coherence and statistical optics : Coherence
(140.3320) Lasers and laser optics : Laser cooling

ToC Category:
Focus Issue: Fluctuations and oscillations of Bose-Einstein

Original Manuscript: September 10, 1997
Published: November 10, 1997

Robert Dodd, Charles Clark, Mark Edwards, and Keith Burnett, "Characterizing the coherence of Bose-Einstein condensates and atom lasers," Opt. Express 1, 284-292 (1997)

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