Electron correlation effects in superconducting nanowires in and out of equilibrium

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Tuovinen , R 2021 , ' Electron correlation effects in superconducting nanowires in and out of equilibrium ' , New Journal of Physics , vol. 23 , no. 8 , 083024 . https://doi.org/10.1088/1367-2630/ac1898

Title: Electron correlation effects in superconducting nanowires in and out of equilibrium
Author: Tuovinen, Riku
Contributor: University of Helsinki, Particle Physics and Astrophysics
Date: 2021-08-16
Language: eng
Number of pages: 13
Belongs to series: New Journal of Physics
ISSN: 1367-2630
URI: http://hdl.handle.net/10138/333456
Abstract: One-dimensional nanowires with strong spin–orbit coupling and proximity-inducedsuperconductivity are predicted to exhibit topological superconductivity with condensed-matteranalogues to Majorana fermions. Here, the nonequilibrium Green’s function approach with thegeneralized Kadanoff–Baym ansatz is employed to study the electron-correlation effects and theirrole in the topological superconducting phase inand out of equilibrium. Electron-correlationeffects are found to affect the transient signaturesregarding the zero-energy Majorana states, whenthe superconducting nanowire is subjected to external perturbations such as magnetic-fieldquenching, laser-pulse excitation, and coupling to biased normal-metal leads.
Subject: 114 Physical sciences
electron correlation
topological superconductor,
nonequilibrium Green’s function
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