相互作用的多种量子气体动力学的有效数值描述

IF 4.2 Q2 QUANTUM SCIENCE & TECHNOLOGY AVS quantum science Pub Date : 2023-11-07 DOI:10.1116/5.0163850
Annie Pichery, Matthias Meister, Baptist Piest, Jonas Böhm, Ernst Maria Rasel, Eric Charron, Naceur Gaaloul
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引用次数: 2

摘要

我们提出了一种高效的方法来数值求解描述多组分玻色-爱因斯坦凝聚体在时变势下的演化动力学的Gross-Pitaevskii方程。这种基于移动和扩展参考系的方法优于基于固定参考系的更标准但计算成本更高的解决方案。它可以精确描述相互作用的长时间行为,多物种量子混合物,包括与微重力和空间实验相关的长时间自由膨胀的挑战性问题。我们演示了最近用探空火箭实验的有效载荷进行的二元Rb-K混合物的实验测量的成功比较。
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Efficient numerical description of the dynamics of interacting multispecies quantum gases
We present a highly efficient method for the numerical solution of coupled Gross–Pitaevskii equations describing the evolution dynamics of a multi-species mixture of Bose–Einstein condensates in time-dependent potentials. This method, based on a moving and expanding reference frame, compares favorably to a more standard but much more computationally expensive solution based on a frozen frame. It allows an accurate description of the long-time behavior of interacting, multi-species quantum mixtures including the challenging problem of long free expansions relevant to microgravity and space experiments. We demonstrate a successful comparison to experimental measurements of a binary Rb–K mixture recently performed with the payload of a sounding rocket experiment.
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CiteScore
9.90
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0.00%
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