Protected ground states in short chains of coupled spins in circuit quantum electrodynamics

Callison, A, Grosfeld, E and Ginossar, E (2016) Protected ground states in short chains of coupled spins in circuit quantum electrodynamics arXiv.

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Abstract

The quasi-degenerate ground state manifold of the anisotropic Ising spin model can encode quantum information, but its degree of protection against local perturbations is known to be only partial. We explain how the coupling between the two ground states can be used to observe signatures of Majorana zero modes in a small controlled chain of qubits. We argue that the protection against certain local perturbations persists across a range of parameters even away from the ideal point. Remarkably, when additional non-local interactions are considered the system enters a phase where the ground states are fully protected against all local field perturbations.

Item Type:	Article
Subjects :	Physics
Divisions :	Faculty of Engineering and Physical Sciences > Physics
Authors :	Authors Email ORCID Callison, A UNSPECIFIED UNSPECIFIED Grosfeld, E UNSPECIFIED UNSPECIFIED Ginossar, E UNSPECIFIED UNSPECIFIED
Date :	31 January 2016
Uncontrolled Keywords :	cond-mat.mes-hall, cond-mat.mes-hall, cond-mat.str-el, quant-ph
Related URLs :	Author
Additional Information :	This is an arXiv version of the work.
Depositing User :	Symplectic Elements
Date Deposited :	09 Mar 2016 14:30
Last Modified :	09 Mar 2016 14:30
URI:	http://epubs.surrey.ac.uk/id/eprint/810082

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