Uncovering Quantum Correlations with Time-Multiplexed Click Detection.

Uncovering Quantum Correlations with Time-Multiplexed Click Detection.
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通过时分复用点击检测揭示量子相关性

DOI:
10.1103/physrevlett.115.023601
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发表时间:
2015
影响因子:
8.6
通讯作者:
C. Silberhorn
C. Silberhorn
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
J. Sperling;M. Bohmann;W. Vogel;G. Harder;B. Brecht;V. Ansari;C. Silberhorn

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我们报道了一种时分复用点击检测方案的实现,以探测不同空间光学模式之间的量子关联。我们证明了这样的测量装置可以发现多模光场中的非经典关联,即使单模约化是纯经典的。通过参数下转换产生的关联光子对的非经典特性,可以利用点击计数理论而不是光电探测模型的低强度近似来立即测量。该分析基于二阶矩和更高阶矩,对于相对较高的平均光子数,这些矩直接从测量的点击统计中检索出来。不需要数据后处理来证明具有高度重要性的兴趣的影响,尽管效率低和实验上的不完善。我们的方法表明,这种新的检测方案是表征量子关联光场在量子通信中的实际应用的一种可靠和稳健的方法。
We report on the implementation of a time-multiplexed click detection scheme to probe quantum correlations between different spatial optical modes. We demonstrate that such measurement setups can uncover nonclassical correlations in multimode light fields even if the single mode reductions are purely classical. The nonclassical character of correlated photon pairs, generated by a parametric down-conversion, is immediately measurable employing the theory of click counting instead of low-intensity approximations with photoelectric detection models. The analysis is based on second- and higher-order moments, which are directly retrieved from the measured click statistics, for relatively high mean photon numbers. No data postprocessing is required to demonstrate the effects of interest with high significance, despite low efficiencies and experimental imperfections. Our approach shows that such novel detection schemes are a reliable and robust way to characterize quantum-correlated light fields for practical applications in quantum communications.
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影响因子: 2.9
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