1203.3393 (J. Baranski et al.)

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

J. Baranski, T. Domanski

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.

View original: http://arxiv.org/abs/1203.3393