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标题：Classical hypercorrelation and wave-optics analogy of quantum superdense coding
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作者：Pengyun Li ; Yifan Sun ; Zhenwei Yang 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2016
卷号：5
期号：1
DOI：10.1038/srep18574
语种：English
出版社：Springer Nature
摘要：We report the first experimental realization of classical hypercorrelation, correlated simultaneously in every degree of freedom (DOF), from observing a Bell-type inequality violation in each DOF: polarization and orbital angular momentum (OAM). Based on such a classical hypercorrelation, we have realized the analogy of quantum superdense coding in classical optics. Comparing it with quantum superdense coding using pairs of photons simultaneously entangled in polarization and OAM, we find that it exhibits many advantages. It is not only very convenient to realize in classical optics, the attainable channel capacity in the experiment for such a superdense coding can also reach 3 bits, which is higher than that (2.8 bits) of usual quantum one. Our findings can not only give novel insight into quantum physics, they may also open a new field of applications in the classical optical information process.