远程制备多粒子纯态

我们提出了一个远程制备三种形式的多粒子纯态的方案,远程制备一般形式的多粒子纯态及两种特殊情况下的多粒子纯态.首先利用大失谐腔制备出N个原子的纠缠态14],并将这N个原子分配给Alice和Bob等其他的参与者.然后Alice根据要远程制备的态对她的原子进行相应的单原子投影测量,并且将测量结果以经典信息的方式告诉给其他参与者.其他参与者根据收到的信息决定对自己的原子要么不操作,要么进行特定的操作,来转换他们所共享的纠缠态,最终除Alice以外的参与者就会处于期望的纠缠态.每一种情况下的信息消耗都是很少的,只消耗一量子比特和一经典比特.整个方案都基于现有的腔量子电动力学技术,因此该方案是可行性的.

Remote preparation of multipartite pure state

We show a scheme for remote preparation of three types of multipartite pure states,general multipartite pure state and two special cases of it.Firstly a N-particle entangled state is prepared with far detuned resonant cavity~(),and then the particles are distributed to the N partners Alice,Bob and so on.Next,According to the state remotely prepared,Alice performs a projective measurement on her particle and tells the message to the other partners.Base on the message received the other partners do nothing or perform an operation on their particles.In the end,except Alice,the other partners share an expected multipartite pure state.In every case only one classical bit is needed.The scheme is in the range of present technology of cavity quantum electrodynamics,thus it is feasible.