Nonequilibrium critical behavior for electron tunneling through quantum dots in an Aharonov-Bohm circuit

Eran Sela*, Ian Affleck

*Corresponding author for this work

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Abstract

Double quantum dots can provide an experimental realization of the two-impurity Kondo model which exhibits a non-Fermi-liquid quantum critical point (QCP) at a special value of its parameters. We generalize our recent study of double quantum dots in series to a parallel configuration with an Aharonov-Bohm flux. We present an exact universal result for the finite temperature and finite voltage conductance G [V,T] along the crossover from the QCP to the low energy Fermi-liquid phase. Compared to the series configuration, here generically G [V,T] G [-V,T], leading to current rectification.

Original languageEnglish
Article number125110
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number12
DOIs
StatePublished - 3 Mar 2009
Externally publishedYes

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