Experimental demonstration of adaptive quantum state estimation for single photonic qubits
Experimental demonstration of adaptive quantum state estimation for single photonic qubits
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DOI：
10.1103/physreva.96.022124
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发表时间：
2017-08-18
影响因子：
2.9
通讯作者：
Takeuchi, Shigeki
中科院分区：
文献类型：
--
作者：
Okamoto, Ryo;Oyama, Satoshi;Takeuchi, Shigeki
本文报道了对完全未知的光子量子比特进行自适应量子态估计的实验演示。类似于我们以前的研究[R。Okamoto等人，物理学评论快报109，130404（2012）]，使用每个光子探测事件的结果更新测量配置，使得我们的方法不需要样本总数的先验知识。通过几个严格的统计检验，本文得到的实验结果证明了强一致性和渐近有效性。此外，我们表明，实验获得的分布的状态估计使用自适应量子状态估计是显着不同的，从传统的状态层析成像，并同意与理论预测。
We herein report the experimental demonstration of adaptive quantum state estimation for totally unknown photonic qubits. Similar to our previous study [R. Okamoto et al., Phys. Rev. Lett. 109, 130404 (2012)], the measurement configuration is updated using the results of each photon detection event so that our method does not require prior knowledge of the total number of samples. The experimental results obtained herein demonstrate both strong consistency and asymptotic efficiency through several rigorous statistical tests. Furthermore, we demonstrate that the experimentally obtained distribution of the states estimated using an adaptive quantum state estimation is significantly different from that obtained by conventional state tomography and agrees well with theoretical predictions.