与双模压缩真空场共振作用下的Λ型三能级原子体系的量子相干性  

Coherence of a Λ-type Three-level Atom in the Interaction Resonantly with two-mode Squeezing Vacuum State Field

作　　者：刘万芳[1] 曾国模[2] 

机构地区：[1]安庆师范学院物理与电气工程学院,安徽安庆246133 [2]吉林大学理论物理研究中心,吉林长春130023

出　　处：《安庆师范学院学报（自然科学版）》2008年第2期33-38,共6页Journal of Anqing Teachers College(Natural Science Edition)

摘　　要：在Λ型三能级原子初态处于叠加态时,通过与双模压缩真空场发生相互作用,讨论了t>0时原子体系的相干性,研究结果表明:随着双模真空场压缩因子的增大,没用光场联系的两个能级间的相干强度有所减小,但是不会出现退相干;用光场联系的两个能级间的相干性逐渐减小,最终会出现退相干。Through the Λ-type three-level atom interacting with two-mold squeezed vacuum field, we discussed the coherence of atomic system providing that. It is shown that with the increasing of squeezing factor, the coherent intensity between two levels decreased without the interaction with the light field, but the decoherence didn＇t appear; otherwise,the coherence also decreased ,but the decoherence appeared finally.

关 键 词：Λ型三能级原子 双模压缩真空场 退相干 

分 类 号：O431.2[机械工程—光学工程]