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

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

2008-07-14

arxiv.org/abs/0807.2202v2

Phys. Rev. A 80, 022337 (2009)

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

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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