Bose-Einstein condensation in dark power-law laser traps
Abstract
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 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.
Keywords
Cite
@article{arxiv.0909.5090,
title = {Bose-Einstein condensation in dark power-law laser traps},
author = {Amine Jaouadi and Naceur Gaaloul and Bruno Viaris De Lesegno and Mourad Telmini and Laurence Pruvost and Eric Charron},
journal= {arXiv preprint arXiv:0909.5090},
year = {2010}
}