Assessing Bound States in a One-Dimensional Topological Superconductor: Majorana versus Tamm

Majorana bound states in topological superconductors have attracted intense research activity in view of applications in topological quantum computation. However, they are not the only example of topological bound states that can occur in such systems. Here, we study a model in which both Majorana a...

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Bibliographic Details
Published in:Symmetry (Basel) 2021-06, Vol.13 (6), p.1100
Main Authors: Vigliotti, Lucia, Cavaliere, Fabio, Carrega, Matteo, Ziani, Niccolò Traverso
Format: Article
Language:English
Subjects:
Boundary conditions
Energy industry
Majorana fermions
Majorana polarization
Quantum computing
Quantum dots
Topological superconductors
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Summary:Majorana bound states in topological superconductors have attracted intense research activity in view of applications in topological quantum computation. However, they are not the only example of topological bound states that can occur in such systems. Here, we study a model in which both Majorana and Tamm bound states compete. We show both numerically and analytically that, surprisingly, the Tamm state remains partially localized even when the spectrum becomes gapless. Despite this fact, we demonstrate that the Majorana polarization shows a clear transition between the two regimes.
ISSN:2073-8994
2073-8994
DOI:10.3390/sym13061100