| Autor: |
Jaouadi, Amine, Gaaloul, Naceur, De Lesegno, Bruno Viaris, Telmini, Mourad, Pruvost, Laurence, Charron, Eric |
| Rok vydání: |
2009 |
| Předmět: |
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| Zdroj: |
Physical Review A: Atomic, Molecular and Optical Physics 82, 2 (2010) 023613 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevA.82.023613 |
| Popis: |
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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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