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Título:
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Quantum dot spin cellular automata for realizing a quantumprocessor
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Autores:
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Bayat, Abolfazl ;
Creffield, Charles E. ;
Jefferson, John H ;
Pepper, Michael ;
Bose, Sougato
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Tipo de documento:
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texto impreso
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Editorial:
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IOP publishing ltd, 2015-10
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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-Modelos matemáticos
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Materia = Ciencias: Física: Física matemática
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Tipo = Artículo
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Resumen:
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We show how single quantum dots, each hosting a singlet-triplet qubit, can be placed in arrays to build a spin quantum cellular automaton. A fast (? 10 ns) deterministic coherent singlet- triplet filtering, as opposed to current incoherent tunneling/slow-adiabatic based quantum gates (operation time ? 300 ns), can be employed to produce a two-qubit gate through capacitive (electrostatic) couplings that can operate over significant distances. This is the coherent version of the widely discussed charge and nano-magnet cellular automata, and would increase speed, reduce dissipation, and perform quantum computation while interfacing smoothly with its classical counterpart. This combines the best of two worlds – the coherence of spin pairs known from quantum technologies, and the strength and range of electrostatic couplings from the charge-based classical cellular automata. Significantly our system has zero electric dipole moment during the whole operation process, thereby increasing its charge dephasing time.
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En línea:
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https://eprints.ucm.es/34988/1/Creffield%20C%2033%20PREPRINT.pdf
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