J-C模型和原子-腔光力学系统中的纠缠交换

基于Jaynes-Cummings模型和原子-腔光力学系统,研究了该系统中原子与机械模之间的纠缠交换机制,讨论了两个原子的相干角和腔场与机械模之间的耦合系数对原子与机械模之间纠缠的影响。一个原子与机械模之间的最大纠缠随着该原子相干角的增大而减小,另一个原子与机械模之间的纠缠存在突然产生和突然死亡现象,并且最大纠缠随该原子相干角的增大而增大。根据这一结果可以制备原子与机械模之间的最大纠缠态,这为纠缠调控提供了一种新的方式。

Entanglement swapping in Jaynes-Cummings model and atom-cavity-optomechanical system

Using the relevant theoretical knowledge of quantum entanglement,the entanglement swapping between atoms and mechanical mode in the Jaynes-Cummings model and atom-cavity-optomechanical systcm is studied.The influence of the coherent angles of two atoms and the coupling coefficient between the cavity field and the mechanical mode on the entanglement between atoms and mechanical mode is discussed.It is shown that the maximum of the entanglement between atom 1 and the mechanical mode decreases with the increase of the first atomic coherent angle.There is the phe nomenon of sudden birth of entanglement between atom 2 and the mechanical mode,and the maximum of the entanglement increases with the increase of the second atomic coherent angle.The maximally entangled state between atoms and the mechanical mode is prepared.The proposal may provide a new way to control and manipulate the entanglement in theory.