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Dissipation-driven generation of two-qubit entanglement mediated by plasmonic waveguides

AuthorsMartín-Cano, Diego; González-Tudela, A.; Martín-Moreno, Luis; García-Vidal, F. J.; Tejedor, C.; Moreno, Esteban
Issue Date2011
PublisherAmerican Physical Society
CitationPhysical Review B 84(23): 235306 (2011)
AbstractWe study the generation of entanglement between two distant qubits mediated by the surface plasmons of a metallic waveguide. We show that a V-shaped channel milled in a flat metallic surface is much more efficient for this purpose than a metallic cylinder. The role of the misalignments of the dipole moments of the qubits, an aspect of great importance for experimental implementations, is also studied. A careful analysis of the quantum dynamics of the system by means of a master equation shows that two-qubit entanglement generation is essentially due to the dissipative part of the effective qubit-qubit coupling provided by the surface plasmons. The influence of a coherent external pumping, needed to achieve a steady-state entanglement, is discussed. Finally, we pay attention to the question of how to get information experimentally on the degree of entanglement achieved in the system. © 2011 American Physical Society.
Identifiersdoi: 10.1103/PhysRevB.84.235306
issn: 1098-0121
e-issn: 1550-235X
Appears in Collections:(ICMA) Artículos
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