中文摘要：

基于光学元件、分别囚禁于两个远距离腔中的两个Λ-型的三能级原子、交叉克尔非线性介质和常规光子探测器,提出一个利用交叉克尔非线性介质实现两原子受控相位门的有效方案.该方案的优点是在Lamb-Dicke极限下,不需要探测器同时相应且具有很高的成功几率.这些器件在目前的实验条件下易于实现.

英文摘要：

We propose an effective protocol to direct implement the two-atom controlled phase gate with the cross-Kerr nonlinearity by interference of polarized photons.The protocol is based on optical elements,two Λ-type three-level atoms trappd in two distant cavities,cross-Kerr nonlinearity and the conventional photon detectors,which are feasible with existing experimental technology.The advantages of the protocol are that in Lamb-Dicke limit,the protocol do not require the simultaneous click of the detectors and has a high success probability.This makes the present protocol more realizable in experiments.