Fermion zero modes at the boundary of superfluid 3He-B

Understand

Superfluid 3He-B belongs to the important special class of time-reversal invariant topological superfluids.

• It has Majorana fermions as edge states on the surface of bulk 3He-B.
• On the rough wall these fermion zero modes have finite density of states at E=0.
• It is possible that Lancaster experiments with a wire vibrating in 3He-B have already probed Majorana fermions living on the surface of the wire.