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arXiv 2402.14629cond-mat.quant-gas
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强相互作用分子玻色-爱因斯坦凝聚体的时域Talbot干涉仪

Temporal Talbot interferometer of strongly interacting molecular Bose-Einstein condensate

Fansu Wei, Zhengxi Zhang, Yuying Chen, Hongmian Shui, Yun Liang, Chen Li, Xiaoji Zhou

AI总结:

本研究通过实验与理论结合,探究了一维光学晶格中$^{6}\rm Li_2$分子BEC构成的时域Talbot干涉仪中相互作用对干涉信号的影响,发现宽相互作用范围内干涉仪仍具有效性,为强相互作用系统量子干涉研究提供了新思路。

摘要:

Talbot干涉仪作为动量分布在时域的周期性复现现象,在多项研究中有着重要应用。衍射与干涉过程中的粒子间相互作用会引入诸多多体物理问题,进而产生非常规的干涉特性。本研究从实验和理论两方面,探究了处于一维光学晶格中的$^{6}\rm Li_2$分子玻色-爱因斯坦凝聚体构成的Talbot干涉仪中相互作用的影响,其相互作用强度可通过磁Feshbach共振直接调控。研究观测到信号恢复的周期和振幅与相互作用强度存在明确的依赖关系:尽管相互作用会提高信号的衰减速率并使恢复时间提前,但我们发现在较宽的相互作用范围内,Talbot干涉仪在特定演化时间尺度内仍能保持很高的有效性,分数Talbot干涉的情况也包含在内。本研究揭示了光学晶格中时域Talbot干涉的相互作用与相干特性之间的相互作用机制,为强相互作用系统中的量子干涉研究铺平了道路。

英文摘要:

Talbot interferometer, as a periodic reproduction of momentum distribution in the time domain, finds significant applications in multiple research. The inter-particle interactions during the diffraction and interference process introduce numerous many-body physics problems, leading to unconventional interference characteristics. This work investigates both experimentally and theoretically the influence of interaction in a Talbot interferometer with a $^{6}\rm Li_2$ molecular Bose-Einstein condensate in a one-dimensional optical lattice, with interaction strength directly tunable via magnetic Feshbach resonance. A clear dependence of the period and amplitude of signal revivals on the interaction strength can be observed. While interactions increase the decay rate of the signal and advance the revivals, we find that over a wide range of interactions, the Talbot interferometer remains highly effective over a certain evolutionary timescale, including the case of fractional Talbot interference. This work provides insight into the interplay between interaction and the coherence properties of a temporal Talbot interference in optical lattices, paving the way for research into quantum interference in strongly interacting systems.

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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