Scheme to measure Majorana fermion lifetimes using a quantum dot

Details Scheme to measure Majorana fermion lifetimes using a quantum dot Scheme to measure Majorana fermion lifetimes using a quantum dot

2010-12-21

arxiv.org/abs/1012.4650v2

Phys. Rev. B 84, 140501(R) (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures. Published version

Scientific paper

We propose a setup to measure the lifetime of the parity of a pair of Majorana bound states. The proposed experiment has one edge Majorana state tunnel coupled to a quantum dot, which in turn is coupled to a metallic electrode. When the Majorana Fermions overlap, even a small relaxation rate qualitatively changes the non-linear transport spectrum, and for strong overlap the lifetime can be read off directly from the height of a current peak. This is important for the usage of Majorana Fermions as a platform for topological quantum computing, where the parity relaxation is a limiting factor.

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