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Publication Detail
Long-lived spin entanglement induced by a spatially correlated thermal bath
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    McCutcheon DPS, Nazir A, Bose S, Fisher AJ
  • Publisher:
    AMER PHYSICAL SOC
  • Publication date:
    08/2009
  • Journal:
    PHYS REV A
  • Volume:
    80
  • Issue:
    2
  • Print ISSN:
    1050-2947
  • Language:
    EN
  • Keywords:
    QUANTUM, DECOHERENCE, DYNAMICS
  • Addresses:
    McCutcheon, DPS
    UCL
    Dept Phys & Astron
    London
    WC1E 6BT
    England

    UCL
    London Ctr Nanotechnol
    London
    WC1H 0AH
    England
Abstract
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.
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