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Capture and release of a conditional state of a cavity QED system by quantum feedback

Smith, W P and Reiner, J E and Orozco, L A and Kuhr, S and Wiseman, H M (2002) Capture and release of a conditional state of a cavity QED system by quantum feedback. Physical Review Letters, 89 (13). ISSN 0031-9007

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    Abstract

    Detection of a single photon escaping an optical cavity QED system prepares a nonclassical state of the electromagnetic field. The evolution of the state can be modified by changing the drive of the cavity. For the appropriate feedback, the conditional state can be captured (stabilized) and then released. This is observed by a conditional intensity measurement that shows suppression of vacuum Rabi oscillations for the length of the feedback pulse and their subsequent return.