两全同二能级原子同时与真空腔场相互作用任意态的纠缠

Entanglement of an arbitrary state of the two identical two-level atoms simultaneously interacting with vacuum cavity field

应用负值量子条件熵,研究了在大失谐情况下,两全同二能级原子同时与一真空腔场相互作用任意态纠缠的时间演化.考察了统初态对两原子系之间量子纠缠的影响,并将结果与concurrence的时间演化作了比较.结果表明,负值条件熵能够作为该条件下两全同二能级原子同时与单模腔场相互作用任意态的,容易解析计算的纠缠度.图2,参12.

It's investigated that the entanglement of an arbitrary state between the two identical two-level atoms simultaneously interacting with vacuum cavity field by using negative quantum condition entropy.It's discussed that the influence of the initial states of system considered on the evolution of entanglement between the two atoms and compare the results of condition entropy of entanglement with those of entanglement between the two-atoms based on the concurrence.The results show that the negative quantum conditional entropy can be regarded as a entanglement measure of an arbitrary states of the two identical two-level atoms with simple calculated analytically.2figs.,12refs.