论文标题

一维捕获的玻色极化物的射频光谱:从绝热到绝热状态的跨界

Radiofrequency spectroscopy of one-dimensional trapped Bose polarons: crossover from the adiabatic to the diabatic regime

论文作者

Mistakidis, S. I., Koutentakis, G. M., Grusdt, F., Sadeghpour, H. R., Schmelcher, P.

论文摘要

我们研究了杂质诱导的动力学的交叉,在受到射频频率(RF)脉冲的捕获的一维玻色极性中,从绝热到绝热状态。利用绝热脉冲进行弱排斥或有吸引力的杂质 - 中等相互作用,多种极性激发或与骨介质的集体呼吸运动的杂质 - 托架相互作用的模式耦合。我们发现,对于强烈的令人反感的杂质 - 浴力相互作用,暂时的正交性灾难在杂质连贯性消失的激发光谱中表现出来。当引入两个杂质时,对于有吸引力或强烈的排斥耦合,杂质 - 障碍相关性会引起相对于单个杂质的谐振的光谱转移。对于重大杂质,二极管峰伴随着一系列等距的侧带共振,与杂质旋转动力学和浴缸的声波的干扰有关。在所有情况下,我们都进入了具有洛伦兹频谱形状的RF场的裸露频率的裸露频率,并以单个极性共振。这项工作对外部陷阱,RF脉冲和杂质 - 障碍相互作用的影响的发现应对新一代冷原子实验有影响。

We investigate the crossover of the impurity-induced dynamics, in trapped one-dimensional Bose polarons subject to radio frequency (rf) pulses of varying intensity, from an adiabatic to a diabatic regime. Utilizing adiabatic pulses for either weak repulsive or attractive impurity-medium interactions, a multitude of polaronic excitations or mode-couplings of the impurity-bath interaction with the collective breathing motion of the bosonic medium are spectrally resolved. We find that for strongly repulsive impurity-bath interactions, a temporal orthogonality catastrophe manifests in resonances in the excitation spectra where impurity coherence vanishes. When two impurities are introduced, impurity-impurity correlations, for either attractive or strong repulsive couplings, induce a spectral shift of the resonances with respect to the single impurity. For a heavy impurity, the polaronic peak is accompanied by a series of equidistant side-band resonances, related to interference of the impurity spin dynamics and the sound waves of the bath. In all cases, we enter the diabatic transfer regime for an increasing bare Rabi frequency of the rf field with a Lorentzian spectral shape featuring a single polaronic resonance. The findings in this work on the effects of external trap, rf pulse and impurity-impurity interaction should have implications for the new generations of cold-atom experiments.

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