运动纠缠双原子与压缩相干态光场相互作用系统的场熵演化  

Evolution of Field Entropy in a System of Squeezed Coherent State Light Field Interacting with Two Moving Entangled Atoms

作　　者：张彩花[1] 萨楚尔夫[1] 格日乐[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院

出　　处：《量子光学学报》2009年第2期144-149,共6页Journal of Quantum Optics

基　　金：国家自然科学基金(60467002);内蒙古自然科学基金(200408020107);内蒙古高等学校科研基金(NJ03038)

摘　　要：利用全量子理论,研究了运动纠缠双原子与压缩相干态光场相互作用系统的场熵演化特性,讨论了相干态振幅参量、光场压缩参量、原子的运动和场模结构参数对系统场熵的影响。结果表明:(1)原子运动导致场熵演化具有周期性。(2)随着相干态振幅参量的增大,原子与光场的纠缠度逐渐减小;而随着压缩参量的增大,原子与光场的纠缠度逐渐增大。(3)随着原子运动速度的增大或场模结构参数的增大,场熵的演化周期缩短,并且场与原子的纠缠度逐渐减小。The field entropy evolution in a system which is composed of two moving entangled atoms interacting with the squeezed coherent state is studied by means of the full quantum theory. The influences of the coherent amplitude factor, the squeezing factor, the atomic motion and the field-model structure parameter on the field entropy are discussed. The result shows that the atomic motion leads to the periodic evolution of the field entropy. An increase of coherent amplitude factor weaken the degree of entanglement between the atoms and the light field. However, an increase of squeezing factor of light strengthen the degree of entanglement between the atoms and the light field. With increasing atomic speed or field-model structure parameter, the evolution period of the field entropy becomes shorter, and the degree of entanglement between field and moving atoms becomes smaller.

关 键 词：量子光学 场熵演化 运动原子 压缩相干态 

分 类 号：O431[机械工程—光学工程]