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Título:
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Spin filtering and entanglement swapping through coherent evolution of a single quantum dot
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Autores:
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Garcia Coello, José ;
Bayat, Abolfazl ;
Bose, Sougato ;
Jefferson, John H ;
Creffield, Charles E.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2010-08-17
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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We exploit the nondissipative dynamics of a pair of electrons in a large square quantum dot to perform singlet-triplet spin measurement through a single charge detection and show how this may be used for entanglement swapping and teleportation. The method is also used to generate the Affleck-Kennedy-LiebTasaki ground state, a further resource for quantum computation. We justify, and derive analytic results for, an effective charge-spin Hamiltonian which is valid over a wide range of parameters and agrees well with exact numerical results of a realistic effective-mass model. Our analysis also indicates that the method is robust to the choice of dot-size and initialization errors, as well as decoherence.
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En línea:
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https://eprints.ucm.es/32951/1/Creffield%20C%2005%20LIBRE.pdf
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