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Journal Articles Physical Review A : Atomic, molecular, and optical physics [1990-2015] Year : 2006

Quantum coherence and population trapping in three-photon processes

Abstract

The spectroscopic properties of a single, tightly trapped atom are studied, when the electronic levels are coupled by three laser fields in an $N$-shaped configuration of levels, whereby a $\Lambda$-type level system is weakly coupled to a metastable state. We show that depending on the laser frequencies the response can be tuned from coherent population trapping at two-photon resonance to novel behaviour at three photon resonance, where the metastable state can get almost unit occupation in a wide range of parameters. For certain parameter regimes the system switches spontaneously between dissipative and coherent dynamics over long time scales.
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Dates and versions

hal-00088084 , version 1 (30-07-2006)
hal-00088084 , version 2 (22-09-2006)

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Caroline Champenois, Giovanna Morigi, Juergen Eschner. Quantum coherence and population trapping in three-photon processes. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2006, 74, pp.053404. ⟨10.1103/PhysRevA.74.053404⟩. ⟨hal-00088084v2⟩

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