Long-lived spin entanglement induced by a spatially correlated thermal bath

D. P S McCutcheon, A. Nazir, S. Bose, A. J. Fisher

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    We investigate how two spatially separated qubits coupled to a common heat bath can be entangled by purely dissipative dynamics. We identify a dynamical time scale associated with the lifetime of the dissipatively generated entanglement and show that it can be much longer than either the typical single-qubit decoherence time or the time scale on which a direct exchange interaction can entangle the qubits. We give an approximate analytical expression for the long-time evolution of the qubit concurrence and propose an ion trap scheme in which such dynamics should be observable. © 2009 The American Physical Society.
    Original languageEnglish
    Article number022337
    JournalPhysical Review A
    Issue number2
    Publication statusPublished - 28 Aug 2009

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