Interaction effects in topological superconducting wires supporting Majorana fermions
By E. Stoudenmire, J. Alicea, O. Starykh, Matthew Fisher. 2011
158 citations recorded by the source corpus.
Among the broad spectrum of systems predicted to exhibit topological superconductivity and Majorana fermions, one-dimensional wires with strong spin-orbit coupling provide one of the most promising experimental candidates. Here we investigate the fate of the topological superconducting phase in such wires when repulsive interactions are present. Using a combination of density matrix renormalization group, bosonization, and Hartree\char21{}Fock techniques, we demonstrate that while interactions degrade the bulk gap\char22{}consistent with recent results of Gangadharaiah et al.\char22{}they also greatly expand the parameter range over which the topological phase arises. In particular, we show that with interactions this phase can be accessed over a broader chemical potential window, thereby leading to greater immunity against disorder-induced chemical potential fluctuations in the wire. We also suggest that in certain wires strong interactions may allow Majorana fermions to be generated without requiring a magnetic field.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/8bf9a49cc10798a6ae607a3368e2fcc23706951d
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In Atomic and Molecular Physics, and Optics
In Condensed Matter Physics
Citations in the corpus
- Long-range Ising and Kitaev models: phases, correlations and edge modes (2015, methodology): “We then compute the wave-functions φ (1,2) j of the massless edge modes as [65]”