Entanglement generation through local field and quantum dissipation

Abstract

Entanglement in a Gaussian two-mode system can be generated by local driving if additional non-local features are introduced to the dynamics. We demonstrate that weak to moderate ohmic friction arising from a dissipative environment can enable entanglement generation in a driven system. This synergy of driving and dissipation is highly sensitive to the pulse shape; several simple pulse shapes fail to produce this effect at all or deposit large amounts of energy in the system as a side effect. Complex pulse shapes, determined by optimal control techniques, however, are effective without detrimental side effects.

6 pages, 3 figures, accepted for publication in Physica Scripta, invited contribution to special volume "FQMT'13: Frontiers of Quantum and Mesoscopic Thermodynamics (Prague, Czech Republic, July 29 -- August 3, 2013)". v2: minor additions

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