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

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

2012-03-15

arxiv.org/abs/1203.3393v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 7 figures

Scientific paper

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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