开放多体系统中共生纠缠的研究

A Study on the Pairwise Concurrence Entanglement in the Multipartite Open System

研究了两对无相互作用的二能级原子分别处于一个非马尔可夫热库中的纠缠动力学问题。计算分析表明,两原子的初始纠缠可以转移到初始没有纠缠的两原子上,并且在转移过程中,两热库起到了中间的媒介作用。通过研究该开放多体系统中的共生对纠缠,在适当的初始条件下,发现初始原子间的纠缠可以发生纠缠猝死现象,并且初始分离两原子和两热库会伴随着出现纠缠的突然产生现象。

The entanglement dynamics of the multipartite open system is investigated,which is arranged in such a way that two atoms are coupled to a common non-Markovian reservoir and another two atoms are embedded in the other remote non-Markovian reservoir.The results show that the initial entanglement of two atoms can transfer to another two separated atoms,the two reservoirs have an intermediate effects in the transfer process.Through studying the pairwise concurrence entanglement in the multipartite open system,it is also found that the initial entanglement can cause the phenomenon of entanglement sudden death under certain condition,and the simultaneous entanglement sudden birth would appear in another separated atoms and the two reservoirs.