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arXiv 2209.03342cond-mat.quant-gas
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受驱原子-腔系统暗态中的凝聚体形成

Condensate formation in a dark state of a driven atom-cavity system

Jim Skulte, Phatthamon Kongkhambut, Sahana Rao, Ludwig Mathey, Hans Keßler, Andreas Hemmerich, Jayson G. Cosme

AI总结:

本研究在耦合高精细度腔的超冷量子气体中证实暗态凝聚体形成,发现其波函数反对称性使原子与腔耦合受抑且关泵浦后仍保持,结合实验与三能级模型等理论验证了该机制。

摘要:

我们在耦合至高精细度腔、并由振动光晶格泵浦的超冷量子气体中,证实了暗态下的凝聚体形成。实验与理论均表明,处于暗态的原子与腔的耦合受到强烈抑制。理论层面,通过求解最小三能级模型及完整原子-腔系统的动力学,验证了这一结论。凝聚体波函数的对称性相对于泵浦晶格的势阱呈反对称,且沿腔方向呈现交错符号。这种对称性使暗态与腔解耦,且在泵浦光强关闭时仍能保持。

英文摘要:

We demonstrate condensate formation in a dark state in an ultracold quantum gas coupled to a high-finesse cavity and pumped by a shaken optical lattice. We show experimentally and theoretically that the atoms in the dark state display a strong suppression of the coupling to the cavity. On the theory side, this is supported by solving the dynamics of a minimal three-level model and of the full atom-cavity system. The symmetry of the condensate wave function is anti-symmetric with respect to the potential minima of the pump lattice, and displays a staggered sign along the cavity direction. This symmetry decouples the dark state from the cavity, and is preserved when the pump intensity is switched off.

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