• Feb 26 2013

    WITS Node Seminar: Dr Ilya Sinayskiy

    The National Institute for Theoretical Physics, and the Centre for Theoretical Physics, School of Physics, would like to invite to its coming talk in the theory seminar series, entitled:

    "Dissipative preparation of the entangled states in the optical cavities"

    to be presented by Dr. Ilya Sinayskiy (NITheP/UKZN)

    Abstract: The control of quantum systems is of fundamental scientific interest for a large variety of reasons. Of particular importance is the study of open quantum systems, especially with respect to control of their dynamics. A scheme will be presented for the dissipative preparation of large W states and generalized Bell states, within the context of cavity QED. In the suggested protocol the dissipative processes of spontaneous emission and cavity loss are no longer undesirable, but essential to the required dynamics.

    For the dissipative preparation of large W states the properties of the irreducible representations of su(3) are utilized. The protocol is constructed which allows to restrict open system dynamics to a fully symmetric irreducible subspace of the total Hilbert space, and hence obtain analytic solutions for effective ground state dynamics of arbitrary sized ensembles of "lambda" atoms within an optical cavity. We explore all aspects of the schemes, relevant to implementation in currently available optical cavities, especially with respect to increasing system size.

    For the dissipative preparation of the generalized Bell states extremely long lived target states are achieved, with fidelities of near unity, utilising cooperativities corresponding to currently available optical cavities. Furthermore, the suggested protocol exhibits excellent scaling of relevant characteristics, with respect to cooperativity, such that improved results may be obtained as the development of experimental capabilities continues.

    Date: Tuesday, 26th February 2013
    Venue: Frank Nabarro Lecture Theatre P216
    Time: 13.20 - 14.10

    For more information please contact:

    Yours sincerely,

    Alan S. Cornell

    School of Physics
    University of the Witwatersrand
    Private Bag 3
    Wits 2050
    South Africa


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