双模SU(1,1)相干态光场与V-型三能级原子玻色-爱因斯坦凝聚体相互作用系统中光场的压缩特性

Squeezing Properties of Two-Mode SU (1,1) Coherent States Interacting with Bose-Einstein Condensate of V-Type Three-Level Atoms

在双模SU(1,1)相干态光场和V-型三能级原子玻色-爱因斯坦凝聚体相互作用系统中,应用全量子理论,在旋波近似下,研究了双模光场的压缩特性,分别讨论了光场与原子之间的耦合常数、原子之间的相互作用和光场参数对光场压缩特性的影响。研究表明,光场的两个正交分量均被周期性压缩,光场与原子的耦合系数和原子间的相互作用强度增大时均使得光场正交分量涨落的周期缩短;光场参数的变化不影响光场压缩的周期,对压缩深度有一定的影响。

The squeezing properties of two-mode SU（1,1） coherent states interacting with Bose-Einstein condensate of V-type three-level atoms are investigated with rotating-wave approximation and Bogoliubov approximation by means of quantum theory . The influences of the coupling constant between light field and atoms, the interaction among atoms in Bose-Einstein condenstate （BEC） and the parameter of light on squeezing properties have been discussed. The results show that two quadrature components can be squeezed periodically, the coupling constant between light field and atoms and the interacting among atoms in BEC also shorten the period of the fluctuations of two quadrature components of light and the light parameter has some influence on the depth of squeezing but has no influence on its period.