摘要
基于弱的交叉克尔效应和线性光学元件,利用光子偏振宇称门呈现了一个关于制备Cluster态的方案.本方案引入了交叉克尔非线性介质,采用了对相干探测模的非破坏测量,有效实现了光子与光子间的相互作用,进而获得所期望的光子纠缠态,同时可以提高制备的成功概率和制备态的保真度.通过本方案可以制备接近完美保真度的四光子偏振Cluster态,并具有接近1的成功概率.在本方案的基础上通过利用线性光学元件还可以获得3N+1个光子的偏振Cluster态.
A scheme for generating Cluster state with the quantum non-demolition polarization parity gate was presented based on weak cross-Kerr nonlinearity and linear-optics elements. The nonlinearity of cross-Kerr medium was introduced in the present scheme in order to achieve effectively the interaction between photons and achieve the desired photon entangled state. The success probability and the perfect fidelity for generating a cluster state could be enhanced due to introducing the nonlinearity of cross-Kerr and quantum non-demolition measurement on the coherence probe modes. The distinct feature of the present scheme is its preparation for a polarization four-photon cluster state with near unity success probability and near perfect fidelity. Furthermore, the cluster state of 3N＋ 1 photons could be obtained with the help of linear optical elements based on the present scheme.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2013年第9期1057-1060,共4页
Acta Photonica Sinica
基金
The Project of Science Research from Education Department of Anhui Province(No.KJ2012Z345)
