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    Entangled radiation via a Raman-driven quantum-beat laser

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    PhysRevA.80.033818.pdf (264.9Kb)
    Date
    2009
    Author
    Qamar, Sajid
    Al-Amri, M.
    Qamar, Shahid
    Zubairy, M. Suhail
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    Abstract
    We propose a scheme for the entanglement generation of two cavity modes using a four-level Raman-driven quantum-beat laser (QBL). The atomic coherence is generated by a Raman-type two-photon process. Two different sufficient conditions for entanglement generation have been investigated. The effect of cavity losses and strength of the driving fields on entanglement generation is studied for different initial states of the resonant cavity modes. The results are in agreement with the earlier scheme for the entanglement generation using a directly driven quantum-beat laser. We observe entanglement generation even for high cavity losses and with low strength of the driving fields. Further, there is no dipole-forbidden transition in the Raman-driven QBL system. Thus the proposed scheme for the entanglement generation is experimentally more viable as compared to the previous directly driven QBL system.
    URI
    http://dx.doi.org/10.1103/PhysRevA.80.033818
    http://hdl.handle.net/1969.1/126634
    Description
    Journals published by the American Physical Society can be found at http://publish.aps.org/
    Subject
    CORRELATED-SPONTANEOUS-EMISSION
    CONTINUOUS VARIABLE SYSTEMS
    COMMUNICATION
    GENERATION
    COHERENCE
    CRITERION
    AMPLIFIER
    CAVITY
    STATES
    ATOMS
    Optics
    Physics
    Department
    Physics and Astronomy
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    Citation
    Sajid Qamar, M. Al-Amri, Shahid Qamar and M. Suhail Zubairy. Phys.Rev.A 80 033818 2009. "Copyright (2009) by the American Physical Society."

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