Quantum coherence and quantum Fisher information in the XXZ system

Publication date: Available online 31 August 2019Source: Physica E: Low-dimensional Systems and NanostructuresAuthor(s): Biao-Liang Ye, Li-Yuan Xue, Yu-Liang Fang, Sheng Liu, Qi-Cheng Wu, Yan-Hui Zhou, Chui-Ping YangAbstractWe investigate the quantum phase transition of the XXZ model via quantum coherence and quantum Fisher information. The quantum phase transition of the nearest, the next-nearest, and the third-nearest particles is demonstrated by quantum Fisher information and quantum coherence measures, i.e., relative entropy, l1 norm, quantum Jensen-Shannon divergence, respectively. Both analytical and numerical results are presented in detail. This work demonstrates that quantum coherence and quantum Fisher information can be used as new quantum measures for characterizing the quantum phase transition of the XXZ spin chain systems.

Source: Physica E: Low dimensional Systems and Nanostructures - September 20, 2019 Category: Nanotechnology Source Type: research