Steered Quantum Coherence as a Signature of Topological Quantum Phase Transitions in the Extended XY Model |
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| Authors: | Ming-Ming Du Shi-Pu Gu Wei Zhong Xiao-Jing Yan Lan Zhou Yu-Bo Sheng |
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| Institution: | 1. College of Electronic and Optical Engineering and College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, 210023 Nanjing, China;2. Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, 210003 Nanjing, China;3. School of Science, Nanjing University of Posts and Telecommunications, 210023 Nanjing, China |
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| Abstract: | In recent years, there has been a surge of interest in exploring coherence measures and correlation measures to characterize topological quantum phase transitions (TQPTs). Here, motivated by the continued push in this direction, the steered quantum coherence (SQC) in the extended XY model is studied to analyze its capability in characterizing TQPTs. It is shown that the first derivative of SQC succeeds in signaling different critical points of TQPTs. In particular, it is found that the SQC is a long-range correlation and the first derivative of SQC can always accurately identify TQPTs for different site distance. |
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| Keywords: | quantum coherence quantum correlations topological quantum phase transitions |
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