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arXiv quant-ph/0003053quant-phphysics.optics
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连续变量量子隐形传态中的保真度和信息量

Fidelity and information in the quantum teleportation of continuous variables

Holger F. Hofmann, Toshiki Ide, Takayoshi Kobayashi, Akira Furusawa

摘要:

理想情况下,量子隐形传态应该传输一个量子态而不失真,也不提供任何关于该态的信息。然而,连续电磁场变量的量子隐形传态引入了额外的噪声,限制了量子态传输的保真度。本文导出了描述量子态转移的算符。转移算符通过增强低光子数和抑制高光子数来修改移位光子数基中的量子态的概率幅度。统计权重的这种修改对应于对原始量子态执行的有限分辨率的测量。因此,有限的保真度的量子隐形传态是一个直接的后果,在测量中获得的信息。

英文摘要:

Ideally, quantum teleportation should transfer a quantum state without distortion and without providing any information about that state. However, quantum teleportation of continuous electromagnetic field variables introduces additional noise, limiting the fidelity of the quantum state transfer. In this article, the operator describing the quantum state transfer is derived. The transfer operator modifies the probability amplitudes of the quantum state in a shifted photon number base by enhancing low photon numbers and suppressing high photon numbers. This modification of the statistical weight corresponds to a measurement of finite resolution performed on the original quantum state. The limited fidelity of quantum teleportation is thus shown to be a direct consequence of the information obtained in the measurement.

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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