Stabilization and control of Majorana bound states with skyrmions (Conference Presentation)

Alexey Kovalev

doi:10.1117/12.2275060

29 September 2017 Stabilization and control of Majorana bound states with skyrmions (Conference Presentation)

Alexey Kovalev

Proceedings Volume 10357, Spintronics X; 103572O (2017) https://doi.org/10.1117/12.2275060
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

Abstract

Majorana bound states (MBSs) are a promising candidate for a realization of topological quantum computer and memory, which uses non-Abelian anyons to encode and manipulate quantum information. Since Kitaev's toy model for creating MBSs using the unpaired sites at the ends of a spinless p-wave superconducting wire, it has been shown that a conventional s-wave superconductor with spin-orbit coupling (SOC) subject to Zeeman or proximity-induced exchange field has effective p-wave pairing and thus can also support these nonlocal quasiparticles. In systems lacking an extrinsic SOC, an effective SOC can be provided through a nonuniform magnetic texture or field. Here, we explore stabilization of MBSs through a proximity effect with a noncollinear ferromagnet supporting skyrmions. Skyrmions can be easily manipulated via currents or temperature gradients thus providing means for braiding and manipulation of MBSs. In particular, we demonstrate how a nonabelian statistics of MBSs can be revealed by moving proximity coupled skyrmions in a vicinity of a tri-junction with different superconducting phases.

Conference Presentation

Citation Download Citation

Alexey Kovalev "Stabilization and control of Majorana bound states with skyrmions (Conference Presentation)", Proc. SPIE 10357, Spintronics X, 103572O (29 September 2017); https://doi.org/10.1117/12.2275060

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