Efficient quantum-state estimation by continuous weak measurement and dynamical control.
Efficient quantum-state estimation by continuous weak measurement and dynamical control.
复制标题
通过连续弱测量和动态控制进行有效的量子态估计。
DOI：
10.1103/physrevlett.97.180403
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发表时间：
2006
影响因子：
8.6
通讯作者：
P. Jessen
中科院分区：
文献类型：
--
作者：
Greg A. Smith;A. Silberfarb;I. Deutsch;P. Jessen
我们展示了一个快速，鲁棒性，和非破坏性的协议，量子状态估计的基础上连续弱测量存在的一个受控的动态演化。我们的实验使用光学探测的原子自旋作为测试床，并成功地重建了一系列的试验状态，近似90%的重复性。该程序有望成为研究复杂量子动力学、测试量子硬件的实用诊断工具，并作为新型量子反馈控制的起点。
We demonstrate a fast, robust, and nondestructive protocol for quantum-state estimation based on continuous weak measurement in the presence of a controlled dynamical evolution. Our experiment uses optically probed atomic spins as a test bed and successfully reconstructs a range of trial states with fidelities of approximately 90%. The procedure holds promise as a practical diagnostic tool for the study of complex quantum dynamics, the testing of quantum hardware, and as a starting point for new types of quantum feedback control.