Reduced fidelity in Kitaev honeycomb model

Details Reduced fidelity in Kitaev honeycomb model Reduced fidelity in Kitaev honeycomb model

2010-05-03

arxiv.org/abs/1005.0303v2

Phys. Rev. A 81, 062350 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 9 figures

Scientific paper

10.1103/PhysRevA.81.062350

We study the reduced fidelity and reduced fidelity susceptibility in the Kitaev honeycomb model. It is shown that the reduced fidelity susceptibility of two nearest site manifest itself a peak at the quantum phase transition point, although the one-site reduced fidelity susceptibility vanishes. Our results directly reveal that the reduced fidelity susceptibility can be used to characterize the quantum phase transition in the Kitaev honeycomb model, and thus suggest that the reduced fidelity susceptibility is an accurate marker of the topological phase transition when it is properly chosen, despite of its local nature.

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