Bolukbasi, Ahmet Tuna and Vala, Jiri (2012) Rigorous calculations of non-Abelian statistics in the Kitaev honeycomb model. New Journal of Physics, 14 (045007). pp. 1-26. ISSN 1367-2630

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Abstract

We develop a rigorous and highly accurate technique for the calculation of the Berry phase in systems with a quadratic Hamiltonian within the context of the Kitaev honeycomb lattice model. The method is based on the recently found solution of the model that uses the Jordan–Wigner-type fermionization in an exact effective spin-hardcore boson representation. We specifically simulate the braiding of two non-Abelian vortices (anyons) in a four-vortex system characterized by a twofold degenerate ground state. The result of the braiding is the non-Abelian Berry matrix, which is in excellent agreement with the predictions of the effective field theory. The most precise results of our simulation are characterized by an error of the order of 10−5 or lower.We observe exponential decay of the error with the distance between vortices, studied in the range of one to nine plaquettes. We also study its correlation with the involved energy gaps and provide a preliminary analysis of the relevant adiabaticity conditions. The work allows one to investigate the Berry phase in other lattice models including the Yao–Kivelson model and particularly the square–octagon model. It also opens up the possibility of studying the Berry phase under nonadiabatic and other effects that may constitute important sources of errors in topological quantum computation.

Item Type:	Article
Additional Information:	The definitive version of this article is available at: Rigorous calculations of non-Abelian statistics in the Kitaev honeycomb model. Ahmet Tuna Bolukbasi and Jiri Vala 2012 New J. Phys. 14 045007
Keywords:	non-Abelian statistics; Kitaev honeycomb model; Berry phase;
Academic Unit:	Faculty of Science and Engineering > Mathematical Physics
Item ID:	5563
Identification Number:	https://doi.org/10.1088/1367-2630/14/4/045007
Depositing User:	Dr. Jiri Vala
Date Deposited:	19 Nov 2014 16:04
Journal or Publication Title:	New Journal of Physics
Publisher:	IOP Publishing
Refereed:	Yes
URI:	http://iopscience.iop.org/1367-2630
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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