Quantum non-Gaussianity of frequency up-converted single photons.
Quantum non-Gaussianity of frequency up-converted single photons.
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DOI：
10.1364/oe.22.022808
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发表时间：
2014-06
期刊：
影响因子：
3.8
通讯作者：
C. Baune;A. Schönbeck;A. Samblowski;J. Fiurášek;R. Schnabel
中科院分区：
文献类型：
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作者：
C. Baune;A. Schönbeck;A. Samblowski;J. Fiurášek;R. Schnabel
光的非经典态是当今量子通信和计量协议的重要资源。非经典态的量子上转换是克服量子信息网络中不同子系统之间频率差异的一种很有前途的方法。在这里，我们通过腔增强自发参数下转换（SPDC）和随后的上转换到532 nm，在1550 nm处产生预示的窄带单光子。量子非高斯性（QNG）是量子信息科学应用中的一个重要特性，首次在频率上转换状态下得到了实验证明。
Nonclassical states of light are an important resource in today's quantum communication and metrology protocols. Quantum up-conversion of nonclassical states is a promising approach to overcome frequency differences between disparate subsystems within a quantum information network. Here, we present the generation of heralded narrowband single photons at 1550 nm via cavity enhanced spontaneous parametric down-conversion (SPDC) and their subsequent up-conversion to 532 nm. Quantum non-Gaussianity (QNG), which is an important feature for applications in quantum information science, was experimentally certified for the first time in frequency up-converted states.