Topologically protected charge transfer along the edge of a chiralp-wave superconductor

N. V. Gnezdilov, B. van Heck, M. Diez, Jimmy A. Hutasoit, C. W. J. Beenakker
2015 Physical Review B  
The Majorana fermions propagating along the edge of a topological superconductor with p_x+ip_y pairing deliver a shot noise power of 1/2× e^2/h per eV of voltage bias. We calculate the full counting statistics of the transferred charge and find that it becomes trinomial in the low-temperature limit, distinct from the binomial statistics of charge-e transfer in a single-mode nanowire or charge-2e transfer through a normal-superconductor interface. All even-order correlators of current
more » ... current fluctuations have a universal quantized value, insensitive to disorder and decoherence. These electrical signatures are experimentally accessible, because they persist for temperatures and voltages large compared to the Thouless energy.
doi:10.1103/physrevb.92.121406 fatcat:zz2q4sl2bjdvzpvzbsrtfw6quu