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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:1504.00059 (cond-mat)
[Submitted on 31 Mar 2015 (v1), last revised 20 Sep 2016 (this version, v2)]

Title:Quantum adiabatic pumping by modulating tunnel phase in quantum dots

Authors:Masahiko Taguchi, Satoshi Nakajima, Toshihiro Kubo, Yasuhiro Tokura
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Abstract:In a mesoscopic system, under zero bias voltage, a finite charge is transferred by quantum adiabatic pumping by adiabatically and periodically changing two or more control parameters. We obtained expressions for the pumped charge for a ring of three quantum dots (QDs) by choosing the magnetic flux penetrating the ring as one of the control parameters. We found that the pumped charge shows a steplike behavior with respect to the variance of the flux. The value of the step heights is not universal but depends on the trajectory of the control parameters. We discuss the physical origin of this behavior on the basis of the Fano resonant condition of the ring.
Comments: 16 pages, 7 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Cite as: arXiv:1504.00059 [cond-mat.mes-hall]
  (or arXiv:1504.00059v2 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.1504.00059
Journal reference: Journal of the Physical Society of Japan 85, 084704 (2016)
Related DOI: https://doi.org/10.7566/JPSJ.85.084704

Submission history

From: Yasuhiro Tokura Prof. [view email]
[v1] Tue, 31 Mar 2015 22:52:28 UTC (710 KB)
[v2] Tue, 20 Sep 2016 21:12:42 UTC (683 KB)
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