Double dot chain as a macroscopic quantum bit

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dc.creatorde Pasquale, F.
dc.creatorGiorgi, G.
dc.creatorPaganelli, S.
dc.date2004-05-18
dc.date2005-01-26
dc.date.accessioned2026-07-07T08:12:44Z
dc.date.available2026-07-07T08:12:44Z
dc.descriptionWe consider an array of N quantum dot pairs interacting via Coulomb interaction between adjacent dots and hopping inside each pair. We show that at the first order in the ratio of hopping and interaction amplitudes, the array maps in an effective two level system with energy separation becoming exponentially small in the macroscopic (large N) limit. Decoherence at zero temperature is studied in the limit of weak coupling with phonons. In this case the macroscopic limit is robust with respect to decoherence. Some possible applications in quantum information processing are discussed.
dc.descriptionPhys. Rev. A (in press)
dc.identifierhttps://arxiv.org/abs/cond-mat/0405412
dc.identifierhttp://arxiv.org/abs/cond-mat/0405412
dc.identifierPhys. Rev. A 71, 042304 (2005)
dc.identifierdoi:10.1103/PhysRevA.71.042304
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/132557
dc.subjectMesoscale and Nanoscale Physics
dc.titleDouble dot chain as a macroscopic quantum bit
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