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Quantum Information Processing

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01-01-2019

Topological quantum phase transitions in the 2-D Kitaev honeycomb model

Authors: Qi Chen, Guo-Qing Zhang, Jun-Qing Cheng, Jing-Bo Xu

Published in: Quantum Information Processing | Issue 1/2019

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Abstract

We study the topological quantum phase transition in the 2-D Kitaev honeycomb model by making use of the square root of the quantum Jensen–Shannon divergence and find that the square root of the quantum Jensen–Shannon divergence exhibits singular behaviors at the critical point of quantum phase transition. The scaling behaviors of the square root of the quantum Jensen–Shannon divergence are also examined from the first-order derivatives, and we demonstrate that the square root of the quantum Jensen–Shannon divergence obeys universal finite-size scaling laws. Furthermore, we explore the performance of quantum discord and the relative entropy coherence of the system. It is shown that quantum discord and relative entropy coherence display similar critical behaviors, and the square root of the quantum Jensen–Shannon divergence and quantum discord can serve as good indicators for quantum phase transitions.

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Title: Topological quantum phase transitions in the 2-D Kitaev honeycomb model
Authors: Qi Chen
Guo-Qing Zhang
Jun-Qing Cheng
Jing-Bo Xu
Publication date: 01-01-2019
Publisher: Springer US
Published in: Quantum Information Processing / Issue 1/2019
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI: https://doi.org/10.1007/s11128-018-2115-3

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