冷原子电路中的电流监测
Monitoring currents in cold-atom circuits
摘要：
冷原子的复杂电路可以用来设计诊断冷原子系统的新协议。具体来说，我们研究了限制在一个环形的潜力耦合有限大小的直线引导的冷凝的淬火动力学。我们发现，在环凝聚中，不同缠绕数的态在波导中的原子动力学是不同的。我们还观察到，耗尽的密度，周围的隧道区域的环凝聚体，可以衰减在一对激发经历Sagnac效应。在我们的方法中，环中冷凝物的当前状态可以仅通过检查直线导轨来读出，使环冷凝物受测量的影响最小。我们相信，我们的研究结果为定义新的量子旋转传感器奠定了基础。同时，我们的方案可以用来探索玻色凝聚动力学的基本问题。
英文摘要：
Complex circuits of cold atoms can be exploited to devise new protocols for the diagnostics of cold-atoms systems. Specifically, we study the quench dynamics of a condensate confined in a ring-shaped potential coupled with a rectilinear guide of finite size. We find that the dynamics of the atoms inside the guide is distinctive of the states with different winding numbers in the ring condensate. We also observe that the depletion of the density, localized around the tunneling region of the ring condensate, can decay in a pair of excitations experiencing a Sagnac effect. In our approach, the current states of the condensate in the ring can be read out by inspection of the rectilinear guide only, leaving the ring condensate minimally affected by the measurement. We believe that our results set the basis for definition of new quantum rotation sensors. At the same time, our scheme can be employed to explore fundamental questions involving dynamics of bosonic condensates.
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