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TitleVirtual electron diffusion through a quantum dot in the presence of electromagnetic fluctuations
Publication TypeJournal Article
Year of Publication2008
AuthorsBubanja, V.
JournalPhysical Review B - Condensed Matter and Materials Physics
Date Published2008
ISSN10980121 (ISSN)
AbstractWe 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+2ReZ (0) / RK. The results will be useful for calculating the accuracy of single-electron devices used in metrology. © 2008 The American Physical Society.

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