Long-distance coherence of Majorana wires
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- PhysRevB.101.241414
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Theoretically, a pair of Majorana bound states in a topological superconductor forms a single fermionic level even at large separations, implying that the parity information is stored nonlocally. The nonlocality leads to a long-distance coherence for electrons tunneling through a Coulomb-blockaded Majorana wire [L. Fu, Phys. Rev. Lett. 104, 056402 (2010)], an effect that can be observed, e.g., in an interferometer. Here, we examine theoretically the coherent electron transfer, taking into account that tunneling implies the long-distance transfer of charge, which is carried by one-dimensional plasmons. We show that the charge dynamics does not affect the coherence of the electron tunneling process in a topological superconductor consisting of a semiconductor wire proximitized by a single bulk superconductor. The coherence may be strongly suppressed, however, if the topological superconductivity derives from a semiconductor wire proximitized by a granular superconductor.
Originalsprog | Engelsk |
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Artikelnummer | 241414 |
Tidsskrift | Physical Review B |
Vol/bind | 101 |
Udgave nummer | 24 |
Antal sider | 5 |
ISSN | 2469-9950 |
DOI | |
Status | Udgivet - 26 jun. 2020 |
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