Decoherence effect on Fano line shapes in double quantum dots coupled between normal and superconducting leads

作者：Baranski J^*; Domanski T

来源：Physical Review B, 2012, 85(20): 205451.

DOI：10.1103/PhysRevB.85.205451

We investigate the Fano-type spectroscopic line shapes 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.

• 出版日期2012-5-29