Bayesian feedback control of a two-atom spin-state in an atom-cavity system.
Bayesian feedback control of a two-atom spin-state in an atom-cavity system.
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DOI：
10.1103/physrevlett.109.173601
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发表时间：
2012-06
影响因子：
8.6
通讯作者：
S. Brakhane;W. Alt;T. Kampschulte;M. Martinez-Dorantes;R. Reimann;Seokchan Yoon;A. Widera;D. Meschede
中科院分区：
文献类型：
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作者：
S. Brakhane;W. Alt;T. Kampschulte;M. Martinez-Dorantes;R. Reimann;Seokchan Yoon;A. Widera;D. Meschede
我们通过实验证明了对高精细光学腔内两个中性铯原子联合自旋态的实时反馈控制。量子态通过其不同的腔传输水平来区分。贝叶斯更新形式用于估计状态占用概率以及转移率。我们通过反馈控制稳定了平衡的双原子混合态，这在确定性上是不可访问的，并发现与蒙特卡罗模拟非常一致。平均而言，反馈回路通过将系统引导至目标状态，稍微超过检索其状态信息的时间，从而实现接近最佳的条件。
We experimentally demonstrate real-time feedback control of the joint spin-state of two neutral cesium atoms inside a high finesse optical cavity. The quantum states are discriminated by their different cavity transmission levels. A Bayesian update formalism is used to estimate state occupation probabilities as well as transition rates. We stabilize the balanced two-atom mixed state, which is deterministically inaccessible, via feedback control and find very good agreement with Monte Carlo simulations. On average, the feedback loop achieves near optimal conditions by steering the system to the target state marginally exceeding the time to retrieve information about its state.