Charge qubit dynamics in a double quantum dot coupled to phonons

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dc.creatorWu, Zhuo-Jie
dc.creatorZhu, Ka-Di
dc.creatorYuan, Xiao-Zhong
dc.creatorJiang, Yi-Wen
dc.creatorZheng, Hang
dc.date2004-12-18
dc.date.accessioned2026-07-07T03:02:47Z
dc.date.available2026-07-07T03:02:47Z
dc.descriptionThe dynamics of charge qubit in a double quantum dot coupled to phonons is investigated theoretically in terms of a perturbation treatment based on a unitary transformation. The dynamical tunneling current is obtained explicitly. The result is compared with the standard perturbation theory at Born-Markov approximation. The decoherence induced by acoustic phonons is analyzed at length. It is shown that the contribution from deformation potential coupling is comparable to that from piezoelectric coupling in small dot size and large tunneling rate case. A possible decoupling mechanism is predicted.
dc.description8 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0412503
dc.identifierhttp://arxiv.org/abs/cond-mat/0412503
dc.identifierPhys. Rev. B 71, 205323 (2005)
dc.identifierdoi:10.1103/PhysRevB.71.205323
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25521
dc.subjectMesoscale and Nanoscale Physics
dc.titleCharge qubit dynamics in a double quantum dot coupled to phonons
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