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

ID: 256678.0, MPI für Kernphysik / Theoretical Quantum Dynamics
Quantum correlations of an atomic ensemble via an incoherent bath
Authors:Macovei, Mihai; Evers, Jörg; Keitel, Christoph Helmut
Date of Publication (YYYY-MM-DD):2005-12
Title of Journal:Physical Review A
Journal Abbrev.:Phys. Rev. A
Issue / Number:6
Start Page:1
End Page:5
Sequence Number of Article:063809
Copyright:©2005 The American Physical Society
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:A rich variety of quantum features can be found in a collection of atoms driven only by an incoherent bath. To demonstrate this, we discuss a sample of three-level atoms in ladder configuration interacting via the surrounding bath, and show that the fluorescence light emitted by this system exhibits nonclassical properties. Realizations could be thermal baths for microwave transitions, or incoherent broadband fields for optical transitions. In a small sample of atoms, the emitted light can be switched from sub- to super-Poissonian and from antibunching to superbunching controlled by the mean number of atoms in the sample. Larger samples allow us to generate superbunched light over a wide range of bath parameters and thus fluorescence light intensities. We also identify parameter ranges where the fields emitted on the two transitions are strongly correlated or anticorrelated, such that the Cauchy-Schwarz inequality is violated. As in a moderately strong bath this violation occurs also for larger numbers of atoms, such samples exhibit macroscopic quantum effects.
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)
External Affiliations:Tech Univ Moldova, Dept Phys, Kishinev, Moldova.
Identifiers:ISI:000234334900138 [ID No:1]
ISSN:1050-2947 [ID No:2]
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