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
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.
. [J]. 中国物理快报, 2014, 31(06): 60302-060302.
ZHANG Ye-Qi, HE Qi-Liang, HU Zheng-Da, LIU Ji-Cai. Quantum Dissonance as an Indicator of Quantum Phase Transition in the XXZ Chain. Chin. Phys. Lett., 2014, 31(06): 60302-060302.