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Decay of entanglement in coupled, driven systems with bipartite decoherence

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Abstract

We analyze a system of two qubits embedded in two different environments. The qubits are coupled to each other and driven on-resonance by two external classical sources. In the secular limit, we obtain exact analytical results for the evolution of the system for several classes of two-qubit mixed initial states. For Werner states we show that the decay of entanglement does not depend on coupling. For other initial states with “X"-type density matrices we find that the sudden death time displays a rich dependence on the coupling energy and state parameters due to the existence of processes of delayed sudden birth of entanglement.

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Authors and Affiliations

  1. Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 5100, 02015, TKK, Finland

    J. Li & G. S. Paraoanu

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  1. J. Li
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  2. G. S. Paraoanu
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Correspondence to G. S. Paraoanu.

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Li, J., Paraoanu, G. Decay of entanglement in coupled, driven systems with bipartite decoherence. Eur. Phys. J. D 56, 255–264 (2010). https://doi.org/10.1140/epjd/e2009-00247-9

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  • DOI: https://doi.org/10.1140/epjd/e2009-00247-9

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