具有交叉克尔非线性的任意集体噪声通道中四光子 Dicke 态的确定性分布。

Deterministic distribution of four-photon Dicke state over an arbitrary collective-noise channel with cross-Kerr nonlinearity.

机构信息

College of Physics Science and Information Engineering, Hebei Normal University, Shijiazhuang 050024, China.

College of Mathematics and Information Science, Hebei Normal University, Shijiazhuang 050024, China.

出版信息

Sci Rep. 2016 Jul 14;6:29853. doi: 10.1038/srep29853.

DOI:10.1038/srep29853

PMID:27412489

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4944160/

Abstract

We present two deterministic quantum entanglement distribution protocols for a four-photon Dicke polarization entangled state resorting to the frequency and spatial degrees of freedom, which are immune to an arbitrary collective-noise channel. Both of the protocols adopt the X homodyne measurement based on the cross-Kerr nonlinearity to complete the task of the single-photon detection with nearly unit probability in principle. After the four receivers share the photons, they add some local unitary operations to obtain a standard four-photon Dicke polarization entangled state.

摘要

我们提出了两种基于频率和空间自由度的四光子狄克极化纠缠态的确定性量子纠缠分发协议，该协议可以抵御任意的集体噪声信道。这两种协议都采用了基于交叉克尔非线性的 X 同调测量来完成单光子探测任务，原则上可以实现近单位概率的探测。在四个接收器共享光子后，它们添加一些局部幺正操作以获得标准的四光子狄克极化纠缠态。