Phys. Rev. B 76, 085335 (2007) [5 pages]Generation of spin entanglement in nonequilibrium quantum dotsReceived 25 June 2007; published 22 August 2007 We propose schemes for generating spatially separated spin entanglement in systems of two quantum dots with onsite Coulomb repulsion weakly coupled to a joint electron reservoir. An enhanced probability for the formation of spin entanglement is found in nonequilibrium situations with one extra electron on each dot, either in the transient state after rapid changes of the gate voltage or in the steady state with applied bias voltage. In both cases, so-called Werner states with spin-singlet fidelity exceeding 1∕2 are generated, which indicates entanglement. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.76.085335
DOI:
10.1103/PhysRevB.76.085335
PACS:
73.21.La, 03.67.Mn, 73.23.Hk, 73.63.Kv
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