ac Stark effect for a two-level atom in a squeezed vacuum via a two-photon process

A system is described in which a real molecular state is tuned into and out of resonance with the intermediate level of a two-photon transition, by the laser-induced ac-Stark effect. Two narrow-band CO2 wave-guide lasers are utilized to induce rovibrational transitions in the ν3 ladder of SF6. A weak probe laser monitors the absorption for the [Formula: see text] two-photon transition. Simultaneously, a strong pump laser is in resonance with the [Formula: see text] one-photon transition. The ac-Stark splitting is observed and quantum interferences between two-photon amplitudes involving different intermediate states occur. It is demonstrated that destructive interference allows suppression of the two-photon excitation for an appropriate pump laser power. Simulations based on the Dressed State Picture and the optical Bloch equations show a satisfactory agreement with the experiment.

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ac Stark effect in a doubly driven three-level atom

Physical Review A ◽

10.1103/physreva.58.2310 ◽

1998 ◽

Vol 58 (3) ◽

pp. 2310-2318 ◽

Cited By ~ 34

Author(s):

Changjiang Wei ◽

Dieter Suter ◽

Andrew S. M. Windsor ◽

Neil B. Manson

Keyword(s):

Stark Effect ◽

Level Atom ◽

Ac Stark Effect

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Two-photon ac-Stark effect in Raman-Ramsey Interactions

2007 IEEE International Frequency Control Symposium Joint with the 21st European Frequency and Time Forum ◽

10.1109/freq.2007.4319028 ◽

2007 ◽

Author(s):

Junhai Zhang ◽

Jingbiao Chen

Keyword(s):

Stark Effect ◽

Two Photon ◽

Ac Stark Effect

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TWO-PHOTON QUANTUM-STATISTICAL PROPERTIES OF THE SINGLE-MODE CAVITY FIELD INTERACTING WITH A PAIR OF COLD ATOMS

International Journal of Quantum Information ◽

10.1142/s0219749909004748 ◽

2009 ◽

Vol 07 (supp01) ◽

pp. 179-186 ◽

Cited By ~ 7

Author(s):

V. I. KOROLI

Keyword(s):

Cold Atoms ◽

Exact Analytical Solution ◽

Single Mode ◽

Initial Moment ◽

Cavity Field ◽

Two Photon ◽

Squeezed Vacuum ◽

Level Atom ◽

Quantum Statistical ◽

Single Mode Cavity

The interaction between the pair of cold two-level atoms and the single-mode cavity field is investigated. The two-level atoms in the pair are supposed to be indistinguishable. This problem generalizes the two-photon Jaynes-Cummings model of a single two-level atom interacting with the squeezed vacuum. The model of the pair of indistinguishable two-level atoms is equivalent to the problem of the equidistant three-level radiator with equal dipole moment matrix transition elements between the adjacent energy levels. Supposing that at the initial moment the field is in the squeezed vacuum state we obtain the exact analytical solution for the atom-field state-vector. By using this solution the quantum-statistical and squeezing properties of the radiation field are investigated. The obtained results are compared with those for the single two-level atom system. We observe that in the model of the pair of cold two-level atoms the exact periodicity of the squeezing revivals is violated by the analogy with the single two-level atom one.

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