保持微波腔体宏观相干性的自反馈方案
Autofeedback scheme for preservation of macroscopic coherence in microwave cavities
摘要：
本文提出了一种在高Q微波腔中控制两个相位相反的相干态线性叠加态的退相干的方案，该方案基于适当制备的“探针”和"反馈“里德伯原子的注入，改进了[D. Vitali等人，物理修订版信函79，2442（1997）]。在本方案中，从探针到反馈原子的信息传输由第二辅助腔直接介导。探测原子的探测效率不再是一个关键参数，叠加态的退相干时间可以使用目前可用的技术显着增加。
英文摘要：
We present a scheme for controlling the decoherence of a linear superposition of two coherent states with opposite phases in a high-Q microwave cavity, based on the injection of appropriately prepared ``probe'' and ``feedback'' Rydberg atoms, improving the one presented in [D. Vitali et al., Phys. Rev. Lett. 79, 2442 (1997)]. In the present scheme, the information transmission from the probe to the feedback atom is directly mediated by a second auxiliary cavity. The detection efficiency for the probe atom is no longer a critical parameter, and the decoherence time of the superposition state can be significantly increased using presently available technology.
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