Topological quantum phase transition in an extended Kitaev spin model

Details Topological quantum phase transition in an extended Kitaev spin model Topological quantum phase transition in an extended Kitaev spin model

2009-02-02

arxiv.org/abs/0902.0219v2

Phys. Rev. B 79, 134431 (2009)

Physics

Condensed Matter

Statistical Mechanics

9 Pages, 4 figures

Scientific paper

We study the quantum phase transition between Abelian and non-Abelian phases in an extended Kitaev spin model on the honeycomb lattice, where the periodic boundary condition is applied by placing the lattice on a torus. Our analytical results show that this spin model exhibits a continuous quantum phase transition. Also, we reveal the relationship between bipartite entanglement and the ground-state energy. Our approach directly shows that both the entanglement and the ground-state energy can be used to characterize the topological quantum phase transition in the extended Kitaev spin model.

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