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Abstract: We study the reduced fidelity and reduced fidelity susceptibility in theKitaev honeycomb model. It is shown that the reduced fidelity susceptibility oftwo nearest site manifest itself a peak at the quantum phase transition point,although the one-site reduced fidelity susceptibility vanishes. Our resultsdirectly reveal that the reduced fidelity susceptibility can be used tocharacterize the quantum phase transition in the Kitaev honeycomb model, andthus suggest that the reduced fidelity susceptibility is an accurate marker ofthe topological phase transition when it is properly chosen, despite of itslocal nature.



Author: Zhi Wang, Tianxing Ma, Shi-Jian Gu, Hai-Qing Lin

Source: https://arxiv.org/



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