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arXiv 1808.05038quant-phphysics.optics
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多光子量子态的在线探测与重构

In-line detection and reconstruction of multi-photon quantum states

Kai Wang, Sergey V. Suchkov, James G. Titchener, Alexander Szameit, Andrey A. Sukhorukov

摘要:

集成的单光子探测器为量子光子电路内部的监测开辟了新的可能性。我们提出了一种在线测量空间编码多光子量子态的概念,同时保持传输的不受干扰。我们从理论上建立,通过记录光子的相关性从最佳位置的探测器上的耦合波导与失谐的传播常数,可以执行强大的重建的密度矩阵描述的振幅,相位,相干性和量子纠缠。我们报告使用经典光的原理验证实验,它模拟单光子制度。我们的方法为量子光子学中的各种应用开辟了一条实用和快速的在线量子测量的途径。

英文摘要:

Integrated single-photon detectors open new possibilities for monitoring inside quantum photonic circuits. We present a concept for the in-line measurement of spatially-encoded multi-photon quantum states, while keeping the transmitted ones undisturbed. We theoretically establish that by recording photon correlations from optimally positioned detectors on top of coupled waveguides with detuned propagation constants, one can perform robust reconstruction of the density matrix describing the amplitude, phase, coherence and quantum entanglement. We report proof-of-principle experiments using classical light, which emulates single-photon regime. Our method opens a pathway towards practical and fast in-line quantum measurements for diverse applications in quantum photonics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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