Riding a wild horse: Majorana fermions interacting with solitons of fast bosonic fields

Details Riding a wild horse: Majorana fermions interacting with solitons of fast bosonic fields Riding a wild horse: Majorana fermions interacting with solitons of fast bosonic fields

2011-11-28

arxiv.org/abs/1111.6643v1

Physics

Condensed Matter

Strongly Correlated Electrons

4.5 pages, 2 figures, accepted to EPL

Scientific paper

I consider a class of one-dimensional models where Majorana fermions interact with bosonic fields. Contrary to a more familiar situation where bosonic degrees of freedom are phonons and as such form a slow subsystem, I consider fast bosons. Such situation exists when the bosonic modes appear as collective excitations of interacting electrons as, for instance, in superconductors or carbon nanotubes. It is shown that an entire new class of excitations emerge, namely bound states of solitons and Majorana fermions. The latter bound states are not topological and their existence and number depend on the interactions and the soliton's velocity. Intriguingly the number of bound states increases with the soliton's velocity.

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