Undamped nonequilibrium dynamics of a nondegenerate Bose gas in a 3D isotropic trap
Undamped nonequilibrium dynamics of a nondegenerate Bose gas in a 3D isotropic trap
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3D 各向同性陷阱中非简并玻色气体的无阻尼非平衡动力学
DOI：
10.1088/1367-2630/17/10/103029
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发表时间：
2015
影响因子：
3.3
通讯作者：
M. Holland
中科院分区：
文献类型：
--
作者：
V. Colussi;C. Straatsma;D. Anderson;M. Holland
我们研究了最近由JILA TOP陷阱实验（Lobser等人在准备中）报道的非简并三维玻色气体在各向同性谐波约束下的反常阻尼。给出了一个现实的限制潜力，我们开发了一个模型，用于研究集体模式，其中包括非谐修正的谐波潜力的影响。通过研究这些陷阱的非谐性在整个温度范围内的影响和碰撞制度，我们发现，阻尼是由退相和碰撞弛豫的联合机制。此外，该模型是由蒙特卡罗模拟，这是在公平的协议与数据从JILA实验的补充。
We investigate anomalous damping of the monopole mode of a non-degenerate 3D Bose gas under isotropic harmonic confinement as recently reported by the JILA TOP trap experiment (Lobser et al in preparation). Given a realistic confining potential, we develop a model for studying collective modes that includes the effects of anharmonic corrections to a harmonic potential. By studying the influence of these trap anharmonicities throughout a range of temperatures and collisional regimes, we find that the damping is caused by the joint mechanisms of dephasing and collisional relaxation. Furthermore, the model is complimented by Monte Carlo simulations which are in fair agreement with data from the JILA experiment.