...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Dynamical preparation of a topological state and out-of-equilibrium bulk-boundary correspondence in a Su-Schrieffer-Heeger chain under periodic driving
【24h】

Dynamical preparation of a topological state and out-of-equilibrium bulk-boundary correspondence in a Su-Schrieffer-Heeger chain under periodic driving

机译：在周期性驾驶下，在苏施莱弗 - Heeger链中的拓扑状态和均衡外散界对应的动态制备

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Exploiting the possibility of temporal variation of the winding number, we have prepared a Su-Schrieffer-Heeger (SSH) chain in its stroboscopic topological state, starting from the trivial one, by application of a periodic perturbation. The periodic driving we employ here is adiabatically switched on to break the particle-hole symmetry and generate a chiral mass term in the effective Floquet Hamiltonian; consequently, the Floquet Hamiltonian also gets deformed without crossing the gapless quantum critical point. The particle-hole symmetry is subsequently restored in the Floquet Hamiltonian by adiabatically switching off a part of the periodic potential. Thereafter, the Floquet Hamiltonian develops a symmetry-protected nontrivial topological winding number. Furthermore, we also observe stroboscopic topologically protected localized edge states in a long open chain and show that a bulk-boundary correspondence survives a unitary nonequilibrium situation in one-dimensional BDI Hamiltonians. Moreover, considering an extended SSH chain with higher neighbor hoppings, we dynamically prepare the system in a stroboscopic out-of-equilibrium topological insulator state starting from a metallic regime. At the same time, we establish the dynamical preparation of higher winding phases in an extended SSH chain with stroboscopic bulk-boundary correspondence in the nonequilibrium state of the system.
机译：利用绕组数的时间变化的可能性，我们在其频道拓扑状态下准备了Su-Schrieffer-Heeger（SSH）链，从琐碎的术语开始，通过应用定期的扰动开始。我们使用的定期驾驶被绝热地接通以破坏粒子孔对称性，并在有效的Floquet Hamiltonian中产生手性质量术语;因此，Floquet Hamiltonian也变形而不交叉无间式临界点。随后通过绝望地切断周期性潜力的一部分，随后在FloqueT Hamiltonian中恢复粒子对称性。此后，Floquet Hamiltonian开发了一种受到对称保护的非拓扑拓扑绕组数。此外，我们还在长开链中观察到频道拓扑保护的局部边缘状态，并显示散装 - 边界对应在一维BDI Hamiltonians中的单一非QuibiRibizium局势。此外，考虑到具有较高邻居跳孔的扩展SSH链，我们在从金属制度开始，动态地在频闪出的平衡拓扑绝缘体状态中制备系统。同时，在系统不足状态下，建立延伸的SSH链中延长SSH链中较高绕组阶段的动态制备。

著录项

  • 来源
    《Physical review》 |2019年第14期|144302.1-144302.9|共9页
  • 作者

    Bandyopadhyay Souvik; Dutta Amit;

  • 作者单位

    Indian Inst Technol Dept Phys Kanpur 208016 Uttar Pradesh India;

    Indian Inst Technol Dept Phys Kanpur 208016 Uttar Pradesh India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号