Parity meter for charge qubits: an efficient quantum entangler

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dc.creatorTrauzettel, B.
dc.creatorJordan, A. N.
dc.creatorBeenakker, C. W. J.
dc.creatorButtiker, M.
dc.date2006-02-22
dc.date2006-04-26
dc.date.accessioned2026-07-07T07:01:52Z
dc.date.available2026-07-07T07:01:52Z
dc.descriptionWe propose a realization of a charge parity meter based on two double quantum dots alongside a quantum point contact. Such a device is a specific example of the general class of mesoscopic quadratic quantum measurement detectors previously investigated by Mao et al. [Phys. Rev. Lett. 93, 056803 (2004)]. Our setup accomplishes entangled state preparation by a current measurement alone, and allows the qubits to be effectively decoupled by pinching off the parity meter. Two applications of the parity meter are discussed: the measurement of Bell's inequality in charge qubits and the realization of a controlled NOT gate.
dc.description8 pages, 4 figures; v2: discussion of measurement time, references added
dc.identifierhttps://arxiv.org/abs/cond-mat/0602514
dc.identifierhttp://arxiv.org/abs/cond-mat/0602514
dc.identifierPhys. Rev. B 73, 235331 (2006)
dc.identifierdoi:10.1103/PhysRevB.73.235331
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108410
dc.subjectMesoscale and Nanoscale Physics
dc.subjectQuantum Physics
dc.titleParity meter for charge qubits: an efficient quantum entangler
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