Bose-Einstein condensation in dark power-law laser traps

A. Jaouadi, N. Gaaloul, B. Viaris de Lesegno, M. Telmini, L. Pruvost, and E. Charron
Phys. Rev. A 82, 023613 – Published 23 August 2010

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 quasihomogeneous 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 the 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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  • Received 28 September 2009

DOI:https://doi.org/10.1103/PhysRevA.82.023613

©2010 American Physical Society

Authors & Affiliations

A. Jaouadi1,2,3, N. Gaaloul4, B. Viaris de Lesegno5,6, M. Telmini3, L. Pruvost5,6, and E. Charron1,2

  • 1Université Paris-Sud, Institut des Sciences Moléculaires d’Orsay (ISMO), F-91405 Orsay, France
  • 2CNRS, Orsay, F-91405 France
  • 3Laboratoire de Spectroscopie Atomique, Moléculaire et Applications (LSAMA), Department of Physics, Faculty of Science of Tunis, University of Tunis El Manar, T-2092 Tunis, Tunisia
  • 4Institut für Quantenoptik, Welfengarten 1, Gottfried Wilhelm Leibniz Universität, D-30167 Hannover, Germany
  • 5CNRS, Laboratoire Aimé Cotton (LAC), F-91405 Orsay, France
  • 6Université Paris-Sud, Orsay, F-91405 France

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Issue

Vol. 82, Iss. 2 — August 2010

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