Acta Physica Sinica, Volume. 68, Issue 4, 040303-1(2019)

Fixed points and dynamic topological phenomena in quench dynamics

Tian-Shu Deng and Wei Yi*
Figures & Tables(4)
Visualizing dynamics on the Bloch sphere: (a) State vector revolving around the axis; (b) illustration of fixed points when ; (c) illustration of critical points with .Bloch球上的动力学演化 (a) 态矢量在Bloch球上绕运动; (b) 动力学不动点对应于; (c) 临界点对应于. 实线代表(绿色)与(红色), 虚线代表态矢量; 假设初态处于基态上, 即时态矢量与方向相反
Momentum-time skyrmions when pre- and post-quench Hamiltonians possess different winding numbers.淬火前后哈密顿量具有不同拓扑数时的典型斯格明子结构. 黑色箭头为自旋在平面内方向, 背景颜色对应自旋在与平面垂直方向上的分量大小, 蓝色对应向内, 黄色对应向外. 竖直虚线为不动点位置, 红色实线表示不同动量点的周期
Non-Hermitian SSH model and its topological phase diagram: (a) Non-Hermitian SSH model; (b) topological phase diagram.非厄米SSH模型及其拓扑相图 (a) 非厄米SSH模型. 在厄米SSH模型的基础上, 每个格点上均有增益或损耗; (b) 体系拓扑相图. 实线为拓扑边界, 虚线为宇称-时间对称与对称破缺区域的边界. , 为SSH模型的跃迁系数, 为增益损耗系数, 为绕数
Dynamic free energy and dynamic topological order parameter in the quench dynamics of non-Hermitian SSH model: (a) Dynamic free energy ; (b) dynamic topological order parameter .非厄密SSH模型淬火中的典型动力学自由能与动力学拓扑序参量(a) 动力学自由能; (b) 动力学拓扑序参量. 在非厄米淬火过程中存在两个临界时间尺度及两个动力学拓扑序参量
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Tian-Shu Deng, Wei Yi. Fixed points and dynamic topological phenomena in quench dynamics[J]. Acta Physica Sinica, 2019, 68(4): 040303-1

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Paper Information

Received: Oct. 30, 2018

Accepted: --

Published Online: Sep. 16, 2020

The Author Email:

DOI:10.7498/aps.68.20181928

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