Bose-Einstein condensation in dark power-law laser traps - Archive ouverte HAL
Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2010

Bose-Einstein condensation in dark power-law laser traps

Résumé

We investigate theoretically an original route to achieve Bose-Einstein condensation using dark power-law laser traps. We propose to create such traps with two crossing blue-detuned Laguerre-Gaussian optical beams. Controlling their azimuthal order $\ell$ allows for the exploration of a multitude of power-law trapping situations in one, two and three dimensions, ranging from the usual harmonic trap to an almost square-well potential, in which a quasi-homogeneous Bose gas can be formed. The usual cigar-shaped and disk-shaped Bose-Einstein condensates obtained in a 1D or 2D harmonic trap take the generic form of a "finger" or of a "hockey puck'' in such Laguerre-Gaussian traps. In addition, for a fixed atom number, higher transition temperatures are obtained in such configurations when compared with a harmonic trap of same volume. This effect, which results in a substantial acceleration of the condensation dynamics, requires a better but still reasonable focusing of the Laguerre-Gaussian beams.
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Dates et versions

hal-00420289 , version 1 (28-09-2009)
hal-00420289 , version 2 (09-09-2010)

Identifiants

Citer

Amine Jaouadi, Naceur Gaaloul, Bruno Viaris de Lesegno, Mourad Telmini, Laurence Pruvost, et al.. Bose-Einstein condensation in dark power-law laser traps. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2010, 82 (2), pp.023613. ⟨10.1103/PhysRevA.82.023613⟩. ⟨hal-00420289v2⟩
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