任意单光子两自由度量子态的概率远程制备

Probabilistic Remote Preparation of an Arbitrary Single-photon State in Two Degrees of Freedom

量子态远程制备为量子信息的传输提供了一种有效的方法.基于共享的部分超纠缠Bell态,提出了任意单光子极化-时间自由度量子态的远程制备方案.发送方根据待制备的量子态信息对手中光子进行幺正操作,通过单光子投影测量和单向经典通信帮助接收方制备出初始量子态,并给出了该方案的成功概率.

Remote state preparation(RSP)provides an effective method for quantum information transmission.Based on the shared partially hyper-entangled Bell state,we present a technique for remotely preparing an arbitrary single-photon state in polarization-temporal degree of freedom between two distant nodes.In the preparation process,the sender will perform unitary operations on her hyper-entangled photon according to her knowledge of the state to be transmitted.By making a single-photon projective measurement on the sender′s photon and one-way classical communication,the target state can be reconstructed at the remote receiver′s quantum system.Moreover,the success probability of our RSP is calculated.