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arXiv 2602.08443cond-mat.quant-gas
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玻色气体中吸引极化子的长寿命振荡

Long-lived oscillations of an attractive polaron in a Bose gas

Univ Toulouse, CNRS, Laboratoire de Physique Théorique(图卢兹大学,法国国家科学研究中心,理论物理实验室)

Saptarshi Majumdar, Aleksandra Petković

AI总结:

研究非零初速度杂质浸入一维弱相互作用均匀玻色子系统的非平衡动力学,发现质量接近或超过临界值的快杂质在达到稳态前表现出无阻尼的长寿命速度振荡,其机制是杂质附近玻色子耗尽云的瞬态局域化振荡。

摘要:

我们研究了一个具有非零初速度的吸引相互作用杂质突然浸入一维弱相互作用均匀玻色子系统中的非平衡动力学。我们在参数空间中揭示并刻画了不同的动力学区域。特别有趣的是,质量接近或超过临界值的快杂质的弛豫过程,其中杂质在达到稳态之前表现出无阻尼的随时间变化的长寿命速度振荡。其潜在机制是杂质附近玻色子耗尽云的瞬态局域化,该云围绕位于杂质位置的玻色子密度峰值振荡。这种振荡态的寿命随杂质-玻色子耦合绝对值的增加而增加。冷原子气体为探测这一现象提供了理想的平台。

英文摘要:

We study the out-of-equilibrium dynamics of an attractively interacting impurity suddenly immersed with a nonzero initial velocity into a system of one-dimensional weakly interacting homogeneous bosons. We uncover and characterize different dynamical regimes in the parameter space. Especially interesting is the relaxation of a fast impurity with a mass close to or exceeding the critical one, where the impurity exhibits undamped temporal long-lived velocity oscillations before reaching a stationary state. The underlying mechanism is the transient localization of a boson depletion cloud near the impurity, that oscillates around the boson density peak situated at the impurity position. The lifetime of this oscillating state increases with the absolute value of the impurity-boson coupling. Cold atomic gases provide an ideal playground where this phenomenon can be probed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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