Journal of Computational Electronics

, Volume 7, Issue 3, pp 280–283 | Cite as

Sharpened Aharanov-Bohm oscillations near resonance in a balanced ring with double quantum dots

  • Eric R. HedinEmail author
  • Yong S. Joe
  • Arkady M. Satanin


In a balanced Aharonov-Bohm ring with an identical quantum dot (QD) in each arm, the transmission amplitude near resonance consists of a zero and pole which can be made to nearly or exactly overlap in the complex-energy plane. This presents a sensitively balanced region of parameter space in which arbitrarily sharp transmission resonance spikes manifest. Analytical results based on a tight-binding solution of the Schrödinger Equation for this system demonstrate the extreme flux sensitivity of the balanced ring in the vicinity of the resonance near the quasi-bound state energy of the QD’s. This effect may have practical applications as a sensitive monitor of magnetic flux.


Aharanov-Bohm rings Quantum dots Resonances 


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Copyright information

© Springer Science+Business Media LLC 2008

Authors and Affiliations

  • Eric R. Hedin
    • 1
    Email author
  • Yong S. Joe
    • 1
  • Arkady M. Satanin
    • 2
  1. 1.Center for Computational Nanoscience, Department of Physics and AstronomyBall State UniversityMuncieUSA
  2. 2.Institute for Physics of Microstructures, RASNizhny NovgorodRussia

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