Schrdinger猫态光场与纠缠态原子相互作用体系的压缩特性

Squeezing properties in a system of entangled atoms interacting with optical field of Schrodinger cat state

研究了初始处于Schrodinger猫态光场与纠缠态原子相互作用体系的压缩特性。通过数值计算,讨论了光场强度和相干态相位角对体系中的双原子偶极压缩和光场压缩的影响。结果表明:在弱场情况下,不存在偶相干态和Yurke-Stoler相干态与纠缠态原子相互作用的光场振幅压缩,但存在奇相干态与纠缠态原子相互作用的光场振幅压缩。在相同的条件下,不存在偶相干态与纠缠态原子相互作用的原子偶极压缩,存在奇相干态和Yurke-Stoler相干态与纠缠态原子相互作用的原子偶极压缩。在强场情况下,三种不同的光场分别与纠缠态原子相互作用,两种压缩现象均不存在。

The squeezing properties of a light-atom interacting system are studied by means of quantum theory. In the system, two two-level atoms are initially in an entangled state, and the coherent optical field is in a SchrSdinger cat state. Influence of the strength of optical field and the phase angle of the coherent states on the double atoms dipole squeezing and the optical field amplitude squeezing are discussed by numerical calculations. It is found that under weak optical field condition, the optical field amplitude squeezing of even coherent state and Yurke-Stoler coherent state interacting with entangled state of atoms is no existence, but the optical field amplitude squeezing of odd coherent states is existence. In the same condition, the double atomic dipole squeezing of even coherent states interacting with entangled state of atoms is no existence, but the double atomic dipole squeezing of odd coherent state and Yurke-Stoler coherent state is existence. Under strong optical field condition, two squeezing phenomenon is no existence.