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

McCutcheon, DPS; Nazir, A; Bose, S; Fisher, AJ; (2009) Long-lived spin entanglement induced by a spatially correlated thermal bath. PHYS REV A , 80 (2) , Article 022337. 10.1103/PhysRevA.80.022337.

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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.

Type: Article
Title: Long-lived spin entanglement induced by a spatially correlated thermal bath
DOI: 10.1103/PhysRevA.80.022337
Keywords: QUANTUM, DECOHERENCE, DYNAMICS
UCL classification: UCL > Office of the President and Provost
UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/104495
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