Dynamics of quantum coherence and quantum Fisher information after a sudden quench

被引:39
作者
Jafari, R. [1 ,2 ,3 ]
Akbari, Alireza [1 ,4 ,5 ,6 ]
机构
[1] Inst Adv Studies Basic Sci IASBS, Dept Phys, Zanjan 4513766731, Iran
[2] Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden
[3] Beijing Computat Sci Res Ctr, Beijing 100094, Peoples R China
[4] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
[5] POSTECH, Max Planck POSTECH Ctr Complex Phase Mat, Pohang 790784, Gyeongbuk, South Korea
[6] POSTECH, Dept Phys, Pohang 790784, Gyeongbuk, South Korea
基金
新加坡国家研究基金会;
关键词
XY-MODEL; STATISTICAL-MECHANICS;
D O I
10.1103/PhysRevA.101.062105
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The dynamics of relative entropy and l(1) norm of coherence, as well as, the Wigner-Yanase skew and quantum Fisher information are studied in the one-dimensional XY spin chain in the presence of a time-dependent transverse magnetic field. We show that, independent of the initial state of the system and while the relative entropy of coherence, the l(1) norm of coherence, and quantum Fisher information are incapable, surprisingly, the Wigner-Yanase skew information dynamic can truly spotlight the equilibrium critical point. We also observe that, when the system is quenched to the critical point, these quantities show suppressions and revivals. Moreover, the first suppression (revival) time scales linearly with the system size and its scaling ratio is unique for all quenches independent of the initial phase of the system. This is the promised universality of the first suppression (revival) time.
引用
收藏
页数:9
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