title: Quantum resistor-capacitor circuit with Majorana fermion modes in a chiral topological superconductor.
abstract: We investigate the mesoscopic resistor-capacitor circuit consisting of a quantum dot coupled to spatially separated Majorana fermion modes in a chiral topological superconductor. We find substantially enhanced relaxation resistance due to the nature of Majorana fermions, which are their own antiparticles and are composed of particle and hole excitations in the same abundance. Further, if only a single Majorana mode is involved, the zero-frequency relaxation resistance is completely suppressed due to a destructive interference. As a result, the Majorana mode opens an exotic dissipative channel on a superconductor which is typically regarded as dissipationless due to its finite superconducting gap.
authors.affiliation: Department of Applied Physics, College of Applied Science, Kyung Hee University, Yongin 446-701, Korea.
authors.forename: Minchul
authors.initials: M
authors.lastname: Lee
authors.affiliation: Department of Physics, Korea University, Seoul 136-701, Korea.
authors.forename: Mahn-Soo
authors.initials: MS
authors.lastname: Choi