A double-dot quantum ratchet driven by an independently biased quantum point contact

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dc.creatorKhrapai, V. S.
dc.creatorLudwig, S.
dc.creatorKotthaus, J. P.
dc.creatorTranitz, H. P.
dc.creatorWegscheider, W.
dc.date2006-06-14
dc.date2006-08-22
dc.date.accessioned2026-07-07T07:12:40Z
dc.date.available2026-07-07T07:12:40Z
dc.descriptionWe study a double quantum dot (DQD) coupled to a strongly biased quantum point contact (QPC), each embedded in independent electric circuits. For weak interdot tunnelling we observe a finite current flowing through the unbiased Coulomb blockaded DQD in response to a strong bias on the QPC. The direction of the current through the DQD is determined by the relative detuning of the energy levels of the two quantum dots. The results are interpreted in terms of a quantum ratchet phenomenon in a DQD energized by a nearby QPC.
dc.descriptionrevised version
dc.identifierhttps://arxiv.org/abs/cond-mat/0606377
dc.identifierhttp://arxiv.org/abs/cond-mat/0606377
dc.identifierPhys. Rev. Lett. 97 176803 (2006)
dc.identifierdoi:10.1103/PhysRevLett.97.176803
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/112153
dc.subjectMesoscale and Nanoscale Physics
dc.titleA double-dot quantum ratchet driven by an independently biased quantum point contact
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