远程控制纠缠原子的偶极平方压缩

Remote Control of Dipole Amplitude-squared Squeezing

考虑将初始处于GHZ态的3个全同二能级原子A、B、C中的2个原子A和B同时注入初态为真空态的单模腔场中发生共振相互作用,而原子C处于腔外的情况.数值计算结果表明,通过对处于纠缠的腔外原子C进行旋转操作和选择性测量可控制腔内双原子系统的偶极平方压缩效应,并且通过适当选择旋转角可实现腔内双原子系统不同程度的偶极压缩.这样,通过利用腔场与原子之间的共振相互作用和原子之间的纠缠关联,可实现腔内原子的偶极平方压缩效应的远程控制.

Considering that three two-level atoms are initially in the GHZ single state and two of the atoms are simultaneously put into a cavity initially in the vacuum state,we compare the dipole amplitude-squared squeezing of the two atoms inside the cavity under a rotation manipulating and direct selective measurement.We investigate the influences of the rotation manipulating and state-selective measurement of the atom outside the cavity on the dipole amplitude-squared squeezing properties of the two atoms inside the cavity.It is shown that dipole amplitude-squared squeezing effect of the two atoms inside the cavity is strongly affected by rotation manipulation and state-selective measurement of the atom outside the cavity.The dipole amplitude-squared squeezing can be controlled by choosing appropriate rotation angle of the atom outside the cavity.Therefore,using the resonance interaction between the cavity and atoms and the entangled correlation between the atoms,we can control the dipole amplitude-squared squeezing of the two atoms inside the cavity through the manipulation of the atom outside.