Smirnov, Sergey (2017) Non-equilibrium Majorana fluctuations. NEW JOURNAL OF PHYSICS, 19: 063020. ISSN 1367-2630,
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Non-equilibrium physics of random events, or fluctuations, is a unique fingerprint of a given system. Here we demonstrate that in non-interacting systems with dynamics driven essentially by Majorana states the effective charge e*, characterizing the electric current fluctuations, is fractional. This is in contrast to non-interacting Dirac systems with the trivial electronic charge e* = e. In the Majorana state, however, we predict two different fractional effective charges at low and high energies, e(1)* = e/2 e(h)* = 3e/2, accessible at low and high bias voltages, respectively. Weshow that while the lowenergy effective charge e(1)* is sensitive to thermal fluctuations of the current, the high-energy effective charge e(h)* is robust against thermal noise. A unique fluctuation signature of Majorana fermions is therefore encoded in the high- voltage tails of the electric current noise easily accessible in experiments on strongly non- equilibrium systems even at high temperatures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SUPERCONDUCTOR; AGITATION; FERMIONS; MOTION; NOISE; Majorana fermions; non-equilibrium noise; effective charge |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:10 |
| Last Modified: | 28 Feb 2019 10:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/690 |
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