We analyze a recent experiment on a Tonks-Girardeau gas of Rb-87 atoms [T. Kinoshita, T. Wenger, and D.S. Weiss, Science 305, 1125 (2004)]. We find that the experimental data are compatible with the one-dimensional theory of Lieb, Seiringer, and Yngvason [Phys. Rev. Lett. 91, 150401 (2003)] but are better described by a theory that takes into account variations in the transverse width of the atomic cloud. By using this theory we investigate also the free axial expansion of the Rb-87 gas in different regimes, Tonks-Girardeau gas, one-dimensional Bose-Einstein condensate and three-dimensional Bose-Einstein condensate.
Quasi-one-dimensional bosons in three-dimensional traps: From strong-coupling to weak-coupling regime / L. Salasnich, A. Parola, L. Reatto. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 72:2(2005), pp. 025602.25602-1-025602.25602-4. [10.1103/PhysRevA.72.025602]
Quasi-one-dimensional bosons in three-dimensional traps: From strong-coupling to weak-coupling regime
L. SalasnichPrimo
;L. ReattoUltimo
2005
Abstract
We analyze a recent experiment on a Tonks-Girardeau gas of Rb-87 atoms [T. Kinoshita, T. Wenger, and D.S. Weiss, Science 305, 1125 (2004)]. We find that the experimental data are compatible with the one-dimensional theory of Lieb, Seiringer, and Yngvason [Phys. Rev. Lett. 91, 150401 (2003)] but are better described by a theory that takes into account variations in the transverse width of the atomic cloud. By using this theory we investigate also the free axial expansion of the Rb-87 gas in different regimes, Tonks-Girardeau gas, one-dimensional Bose-Einstein condensate and three-dimensional Bose-Einstein condensate.
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