双腔系统中腔场间的纠缠

Entanglement between Double Single-mode Cavity Fields

考虑单个二能级原子穿过两个空间分离的单模腔场。由于腔场与原子间的相互作用使得两个腔场间产生纠缠。研究原子质心运动的动能、腔长和腔间距对这种纠缠的影响。结果表明:在原子的动能较小时,原子通过双腔系统的几率较小,腔场间产生纠缠的几率也小;原子动能较大时,原子更容易隧穿双腔系统,腔场间产生的纠缠几率也较大。

An two-level atom is considered passes through double spatially separated single-mode cavity fields and the influence of the center-of- mass motion of the atom is investigated, the length of the cavity and the separa- tion between two cavities on entanglement between the cavity fields because of interaction between the atom and the cavity fields. It is found that in the case of ultra-cold atom, when k/ko 〈 1, the probility that the atom passes through double cavity fields is small, and the entanglement is generated is small too. And when k/ko 〉 1, the result is eontraty.