Dissipation-driven generation of two-qubit entanglement mediated by plasmonic waveguides
Entidad
UAM. Departamento de Física Teórica de la Materia CondensadaEditor
The American Physical SocietyFecha de edición
2011-12-05Cita
10.1103/PhysRevB.84.235306
Physycal Review B 84.23 (2011): 235306
ISSN
1098-0121 (print); 1550-235X (online)DOI
10.1103/PhysRevB.84.235306Financiado por
Work supported by the Spanish MICINN (MAT2008- 01555, MAT2008-06609-C02, CSD2006-00019-QOIT, and CSD2007-046-NanoLight.es) and CAM (S-2009/ESP-1503). D.M.-C. and A.G.-T acknowledge FPU grants (AP2007-00891 and AP2008-00101, respectively) from the Spanish Ministry of EducationProyecto
Comunidad de Madrid. S2009/ESP-1503/Q&CLIGHTVersión del editor
http://dx.doi.org/10.1103/PhysRevB.84.235306Materias
FísicaDerechos
© 2011 American Physical SocietyResumen
We 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 bymeans 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
Lista de ficheros
Google Scholar:Martín-Cano, Diego
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González-Tudela, Alejandro
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Martín-Moreno, L.
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García Vidal, Fco. José
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Tejedor de Paz, Carlos
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Moreno Soriano, Esteban
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