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Suppression of 2π phase slip due to hidden zero modes in one dimensional topological superconductors

Pekker, David and Hou, Chang-Yu and Bergman, Doron L. and Goldberg, Sam and Adagideli, İnanç and Hassler, Fabian (2013) Suppression of 2π phase slip due to hidden zero modes in one dimensional topological superconductors. Physical Review B: Condensed Matter and Materials Physics, 87 (6). ISSN 1098-0121 (Print) 1550-235X (Online)

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Official URL: http://dx.doi.org/10.1103/PhysRevB.87.064506

Abstract

We study phase slips in one-dimensional topological superconducting wires. These wires have been proposed as building blocks for topologically protected qubits in which the quantum information is distributed over the length of the device and thus is immune to local sources of decoherence. However, phase-slips are non-local events that can result in decoherence. Phase slips in topological superconductors are peculiar for the reason that they occur in multiples of $4\pi$ (instead of $2\pi$ in conventional superconductors). We re-establish this fact via a beautiful analogy to the particle physics concept of dynamic symmetry breaking by explicitly finding a "hidden" zero mode in the fermion spectrum computed in the background of a $2\pi$ phase-slip. Armed with the understanding of phase-slips in topological superconductors, we propose a simple experimental setup with which the predictions can be tested by monitoring tunneling rate of a superconducting flux quantum through a topological superconducting wire.

Item Type:Article
Additional Information:Article number: 064506
Subjects:Q Science > QC Physics
Q Science > QC Physics > QC176-176.9 Solids. Solid state physics
ID Code:21457
Deposited By:İnanç Adagideli
Deposited On:22 Feb 2013 12:20
Last Modified:19 Nov 2014 15:30

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