Discussions of ground state in Lambda-type three-level system

Xiaohong Li Xiaohong Li, Tao Liu Tao Liu, Kelin Wang Kelin Wang

The effects of counter-rotating terms on ground states (GS) of a lambda-type three-level atomic system coupled with two fields are examined. The GS, which are dark states in rotating wave approximation (RWA), can be expressed by a simple formula including the excited states. When the coupling strength is less than 0.2 of the maximum energy splitting in the atomic system, the component coefficients of excited states in the GS can be described by the formula similar as that in a two-level system and have linear relationship with their coupling constant. Further increasing the coupling strength will increase the excited components in the GS more rapidly, very different from the two-level system. OCIS codes: 270.1670. doi: 10.3788/COL201210.S12701.

N. K. Rahman

Xiangyang Zhang, Lianzhen Liu

YangFei, CongShuang

Coherence preservation of a multilevel system subject to Markovian decoherence is studied. A Λ-type three-level atom is selected as the system model. Coherence preservation between a ground state a...

I. V. Lebedev

Zhuo‐Liang Cao

The dynamic behavior of the interaction between a Λ-type degenerate quantum-beat three-level atomic system and a coherent light field is discussed in light of the time evolution operator.The squeezed state of the light field is also studied in this paper.