Author:
Cao Yuan,Li Yu-Huai,Cao Zhu,Yin Juan,Chen Yu-Ao,Yin Hua-Lei,Chen Teng-Yun,Ma Xiongfeng,Peng Cheng-Zhi,Pan Jian-Wei
Abstract
Intuition from our everyday lives gives rise to the belief that information exchanged between remote parties is carried by physical particles. Surprisingly, in a recent theoretical study [Salih H, Li ZH, Al-Amri M, Zubairy MS (2013) Phys Rev Lett 110:170502], quantum mechanics was found to allow for communication, even without the actual transmission of physical particles. From the viewpoint of communication, this mystery stems from a (nonintuitive) fundamental concept in quantum mechanics—wave-particle duality. All particles can be described fully by wave functions. To determine whether light appears in a channel, one refers to the amplitude of its wave function. However, in counterfactual communication, information is carried by the phase part of the wave function. Using a single-photon source, we experimentally demonstrate the counterfactual communication and successfully transfer a monochrome bitmap from one location to another by using a nested version of the quantum Zeno effect.
Funder
National Basic Research Program of China
National Natural Science Foundation of China
Publisher
Proceedings of the National Academy of Sciences
Cited by
75 articles.
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