Loss tolerant quantum absorption measurement
Loss tolerant quantum absorption measurement
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DOI：
10.1088/1367-2630/abbab4
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发表时间：
2020-10
影响因子：
3.3
通讯作者：
R. Okamoto;Yuta Tokami;S. Takeuchi
中科院分区：
文献类型：
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作者：
R. Okamoto;Yuta Tokami;S. Takeuchi
纠缠光子对的量子统计保证了比经典方法更好的吸收测量性能。然而，量子方法的性能很容易在由实验限制引起的光子损失下降低。在这里，我们提出了一个在非线性干涉仪中使用量子相消干涉的容损量子方案。我们的理论结果表明，损失容忍量子方案优于传统的量子方案下的光子损失在检测阶段。我们演示了如何在光路和模式失配的非线性干涉仪的光子损失影响我们的计划的性能。我们还提出了一种混合方法来科普量子相消干涉不完美的情况，并表明混合方案总是优于传统的量子方案。
The quantum statistics of entangled photon pairs promise greater performance for absorption measurements than can be achieved classically. However, the performance of a quantum approach is easily degraded under a loss of photons caused by experimental limitations. Here, we propose a loss-tolerant quantum scheme using quantum destructive interference in a nonlinear interferometer. Our theoretical results show that the loss-tolerant quantum scheme surpasses the conventional quantum scheme under photon loss at the detection stage. We demonstrate how photon losses at optical paths and mode-mismatches in a nonlinear interferometer affect the performance of our scheme. We also propose a hybrid approach to cope with the case where the quantum destructive interference is imperfect, and show that the hybrid scheme always surpasses the conventional quantum scheme.