Phys. Rev. B 78, 155423 (2008) [6 pages]Virtual electron diffusion through a quantum dot in the presence of electromagnetic fluctuationsReceived 18 July 2008; revised 22 September 2008; published 23 October 2008 We consider a double junction system in the Coulomb blockade regime with an island with discrete energy levels and analyze the effect of electromagnetic fluctuations on elastic cotunneling. We obtain the analytic expression for the elastic cotunneling current at zero temperature, which shows the power-law suppression of cotunneling at low voltages due to circuit impedance I∼V1+2 Re Z(0)/RK. The results will be useful for calculating the accuracy of single-electron devices used in metrology. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.78.155423
DOI:
10.1103/PhysRevB.78.155423
PACS:
73.23.Hk, 85.35.Gv
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