Decoherence effect on the Fano lineshapes in double quantum dots coupled between normal and superconducting leads

J. Baranski; T. Domanski

doi:10.1103/physrevb.85.205451

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arXiv · 1203.3393

Decoherence effect on the Fano lineshapes in double quantum dots coupled between normal and superconducting leads

J. Baranski·T. Domanski

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Abstract

We investigate the Fano-type spectroscopic lineshapes of the T-shape double quantum dot coupled between the conducting and superconducting electrodes and analyze their stability on a decoherence. Because of the proximity effect the quantum interference patterns appear simultaneously at +/- epsilon_2, where epsilon_2 is an energy of the side-attached quantum dot. We find that decoherence gradually suppresses both such interferometric structures. We also show that at low temperatures another tiny Fano-type structure can be induced upon forming the Kondo state on the side-coupled quantum dot due to its coupling to the floating lead.

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J. Baranski, T. Domanski. 2012-03-15. Decoherence effect on the Fano lineshapes in double quantum dots coupled between normal and superconducting leads. https://doi.org/10.1103/physrevb.85.205451

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