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Quantum Dissonance as an Indicator of Quantum Phase Transition in the XXZ Chain |
| ZHANG Ye-Qi1**, HE Qi-Liang2, HU Zheng-Da3, LIU Ji-Cai1 |
1Department of Mathematics and Physics, North China Electric Power University, Beijing 102206
2School of Physics and Electronics, Guizhou Normal University, Guiyang 550001
3School of Science, Jiangnan University, Wuxi 214122
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ZHANG Ye-Qi, HE Qi-Liang, HU Zheng-Da et al 2014 Chin. Phys. Lett. 31 060302 |
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Abstract We investigate the behavior of quantum dissonance in the anti-ferromagnetic XXZ spin S=1/2 chain, which exhibits a quantum phase transition. Based on a unified view of quantum and classical correlations, quantum dissonance is analytically calculated and is compared with entanglement, discord, and classical correlations for the ground state of the system. It is found that the nearest-neighbor quantum dissonance achieves an extremum and exhibits the sharpest change at the critical point. Therefore, quantum dissonance may serve as a more efficient indicator of quantum phase transitions in the XXZ spin chain.
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Published: 26 May 2014
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