Bose-Einstein condensation transition studies for atoms confined in Laguerre-Gaussian laser modes

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• 作者：T.G. Akin^a ; Sharon Kennedy^a ; Ben Dribus^b ; Jeremy L. Marzuola^c ; Lise Johnson^d ; Jason Alexander^e ; E.R.I. Abraham^a ; ^{abraham@nhn.ou.edu}
• 关键词：Laguerre-Gaussian beams ; Bose-Einstein condensation ; Atom traps ; Laser cooling and trapping ; Vorticies
• 刊名：Optics Communications
• 出版年：2012
• 出版时间：1 January, 2012
• 年：2012
• 卷：285
• 期：1
• 页码：84-89
• 全文大小：791 K

文摘

Multiply-connected traps for cold, neutral atoms fix vortex cores of quantum gases. Laguerre-Gaussian laser modes are ideal for such traps due to their phase stability. We report theoretical calculations of the Bose-Einstein condensation transition properties and thermal characteristics of neutral atoms trapped in multiply connected geometries formed by Laguerre-Gaussian (LG_p^l) beams. Specifically, we consider atoms confined to the anti-node of a LG₀¹ laser mode detuned to the red of an atomic resonance frequency, and those confined in the node of a blue-detuned LG₁¹ beam. We compare the results of using the full potential to those approximating the potential minimum with a simple harmonic oscillator potential. We find that deviations between calculations of the full potential and the simple harmonic oscillator can be up to 3 % -8 % for trap parameters consistent with typical experiments.