In this paper we study the finite-frequency current cross-correlations for a topological superconducting nanowire attached to two terminals at one of its ends. Using an analytic 1D model we show that the presence of a Majorana bound state yields vanishing cross-correlations for frequencies larger than twice the applied transport voltage, in contrast to what is found for a zero-energy ordinary Andreev bound state. Zero cross-correlations at high frequency have been confirmed using a more realistic tight-binding model for finite-width topological superconducting nanowires. Finite-temperature effects have also been investigated.
@article{arxiv.1508.07832,
title = {Finite-frequency noise in a topological superconducting wire},
author = {Stefano Valentini and Michele Governale and Rosario Fazio and Fabio Taddei},
journal= {arXiv preprint arXiv:1508.07832},
year = {2015}
}
Comments
Contribution for the special issue of Physica E in memory of Markus B\"uttiker. 9 pages, 7 figures