Quantum coherence and population trapping in three-photon processes
Champenois, Caroline (Université de Provence)
Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física)
Eschner, Jürgen (Institut de Ciències Fotòniques)
American Physical Society

Date:	2006
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 Λ-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 a behavior 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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Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Physical review. A, Vol. 74, Issue 5 (November 2006) , p. 053404-1-053404-10, ISSN 1050-2947

DOI: 10.1103/PhysRevA.74.053404

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