纠缠双原子与光场非共振作用中场的反聚束效应  

Antibunching Effect of Field in Non-resonant Interaction Between Entangled Double Atoms and Coherent Field

作　　者：张立辉[1] 石文星[1] 詹志明[1] 李星[1] 

机构地区：[1]江汉大学物理与信息工程学院,湖北武汉430056

出　　处：《江汉大学学报（自然科学版）》2011年第3期5-8,共4页Journal of Jianghan University：Natural Science Edition

基　　金：湖北省自然科学基金资助项目(2008CDZ095)

摘　　要：采用全量子论和数值计算的方法,研究了处于耗散腔中的纠缠双原子与相干光场非共振相互作用系统中场的反聚束效应.讨论了初始光场平均光子数、光场与原子间的失谐量和腔场的衰减常数对光场反聚束效应的影响.结果表明,初始光场的平均光子数对光场的反聚束效应存在显著影响:当初始光场较弱时,光场与原子间的失谐量使光场的聚束效应与反聚束效应交替出现,适当增大失谐量,光场呈现反聚束效应的时间明显延长,光子间出现负关联的程度明显增强,但这一非经典特性因腔场的耗散而逐渐消失.By using the fully quantum theory and the numerical calculation, the field antibunching effects were studied when the coherence fields interacted non-resonant with the entangled double atoms in the dissipative cavity. The influence of the initial mean photon numbers, the detuning of atom and field, the cavity damping rates on the field antibunching effects were disscussed. The results showed that the initial mean photon numbers significantly affected the antibunching effect of the field. If the initial field was weak, the bunching and antibunching occured in turns caused by the atom-field detuning. As the detuning increased, the time of antibunching effect was expanded and the negative correlation increased obviously among photons. However, the non-classical pro- perties trended to vanish as the decay rates increased in cavity.

关 键 词：非共振相互作用 反聚束效应 耗散腔 二阶相干度 

分 类 号：O431-2[机械工程—光学工程]