Per citar aquest document: http://ddd.uab.cat/record/115681
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 Ciencies Fotòniques (Castelldefels, Catalunya))
American Physical Society

Data: 2006
Resum: 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.
Drets: Tots els drets reservats.
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Publicat a: Physical review. A, Vol. 74, Issue 5 (November 2006) , p. 053404-1-053404-10, ISSN 1050-2947

DOI: 10.1103/PhysRevA.74.053404


10 p, 556.0 KB

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