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Quantum Information and Computation     ISSN: 1533-7146      published since 2001
Vol.5 No.4&5 July 2005

Universal dynamical control of decay and decoherence for  weak and strong system-bath coupling (pp285-317)
         Goren Gordon, Gershon Kurizki, Abraham G. Kofman, and Sophie Pellegrin
         
doi: https://doi.org/10.26421/QIC5.45-3

Abstracts: A unified theory is given of dynamically modified decay and decoherence in driven two-level and multilevel quantum systems that are weakly coupled to arbitrary finite-temperature reservoirs and undergo random phase fluctuations. Criteria for the optimization of decoherence suppression and the limitations of this approach are obtained. For a driven qubit that is strongly coupled to the continuum edge of reservoir's spectrum, we demonstrate that only an appropriately ordered sequence of abrupt changes of the resonance frequency, near the continuum edge, can effectively protect the qubit state from decoherence.
Key words: decoherence control, dynamical control, quantum information

 

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