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arXiv 2012.04892quant-ph
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s波相互作用对原子聚焦的影响

The Influence of s-wave interactions on focussing of atoms

A. M. Kordbacheh, A. M. Martin

摘要:

数值研究了铷原子玻色-爱因斯坦凝聚体在光晶格势作用下的聚焦。与经典的轨迹模型,低估了聚焦光束的半高宽的结果进行比较。通过列入相互作用的影响,在玻色-爱因斯坦凝聚体,到经典的轨迹模型,我们表明,它是可能的,以获得可靠的估计相比,数值积分的Gross-Pitaevskii方程的聚焦光束的半高宽。最后,我们调查的最佳制度的聚焦和发现,对于一个强相互作用的玻色-爱因斯坦凝聚体聚焦的顺序为20 nm的可能性。

英文摘要:

The focusing of a rubidium Bose-Einstein condensate via an optical lattice potential is numerically investigated. The results are compared with a classical trajectory model which under-estimates the full width half maximum of the focused beam. Via the inclusion of the effects of interactions, in the Bose-Einstein condensate, into the classical trajectory model we show that it is possible to obtain reliable estimates for the full width half maximum of the focused beam when compared to numerical integration of the Gross-Pitaevskii equation. Finally, we investigate the optimal regimes for focusing and find that for a strongly interacting Bose-Einstein condensate focusing of order 20 nm may be possible.

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