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          Institute: MPI für Kernphysik     Collection: Theoretical Quantum Dynamics     Display Documents



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ID: 285691.0, MPI für Kernphysik / Theoretical Quantum Dynamics
Geometry-dependent dynamics of two Λ-type atoms via vacuum-induced coherences
Authors:Evers, Jörg; Kiffner, Martin; Macovei, Mihai; Keitel, Christoph Helmut
Language:English
Date of Publication (YYYY-MM-DD):2006-02-06
Title of Journal:Physical Review A
Journal Abbrev.:Phys. Rev. A
Volume:73
Sequence Number of Article:023804
Copyright:©2006 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The dynamics of a pair of atoms can significantly differ from the single-atom dynamics if the distance of the two atoms is small on a scale given by the relevant transition wavelengths. Here, we discuss two nearby three-level atoms in Λ configuration, and focus on the dependence of the optical properties on the geometry of the setup. We find that in general transitions in the two atoms can be dipole-dipole coupled by interactions via the vacuum field even if their transition dipole moments are orthogonal. We give an interpretation of this effect and show that it may crucially influence the system dynamics. In particular, for a fixed setup of driving fields and detectors, the spatial orientation of the two-atom pair decides if the system reaches a true constant steady state or if it exhibits periodic oscillations in the long-time limit. As an example observable, we study the resonance fluorescence intensity, which is either constant or is modulated periodically in the long-time limit.
External Publication Status:published
Document Type:Article
Communicated by:C.H. Keitel
Affiliations:MPI für Kernphysik/ Group C.H. Keitel/Quantum Interferences and Collective Quantum Dynamics (J. Evers)
Identifiers:DOI:10.1103/PhysRevA.73.023804
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