Phys. Rev. Lett. 84, 2060–2063 (2000)

Density Dependence of the Transition Temperature in a Homogeneous Bose-Einstein Condensate

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J. D. Reppy, B. C. Crooker^*, B. Hebral^†, A. D. Corwin, J. He, and G. M. Zassenhaus^‡
Laboratory of Atomic and Solid State Physics and The Cornell Center for Materials Research, Clark Hall, Cornell University, Ithaca, New York 14853-2501

Received 1 October 1999; published in the issue dated 6 March 2000

Transition temperature data obtained as a function of particle density in the ⁴He-Vycor system are compared with recent theoretical calculations for 3D Bose-condensed systems. In the low density dilute Bose gas regime we find, in agreement with theory, a positive shift in the transition temperature of the form ΔT/T₀ = γ(na³)^1/3. At higher densities a maximum is found in the ratio of T_c/T₀ for a value of the interaction parameter, na³, that is in agreement with path-integral Monte Carlo calculations.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.84.2060

DOI:

10.1103/PhysRevLett.84.2060

PACS:

03.75.Fi, 05.30.Jp, 67.40.-w

^*Present address: Physics Dept., Fordham University, Bronx, NY 10458-5198.

^†Present address: CNRS-CRTBT, BP 166, 25 avenue des Martyrs, 38042 Grenoble Cedex 9, France.

^‡Present address: McKinsey & Company, Three Landmark Square, 1st Floor, Stamford, CT 06901.

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Phys. Rev. Lett. 84, 2060–2063 (2000)

Density Dependence of the Transition Temperature in a Homogeneous Bose-Einstein Condensate