论文标题
三维手性拓扑绝缘子的量子模拟
Quantum simulation for three-dimensional chiral topological insulator
论文作者
论文摘要
量子模拟是一种最先进的技术,为探索超出自然限制的拓扑量子阶段提供了强大的方法。然而,先前未实现的三维(3D)手性拓扑绝缘子,并通过量子淬灭了散装和表面拓扑物理学的完整研究。首先,观察到动量空间中的动力学散装对应关系,表明3D相的散装拓扑独特地对应于2D动量超丘面上出现的非平凡的淬灭动力学,称为带反向表面(BISS),等于在真实空间中的散装对应关系。此外,通过测量BISS上的动态自旋纹理来发现3D手性相的对称保护,当保留手性对称性时,它表现出完美的(断裂)拓扑(断裂)。最后,我们测量拓扑电荷以直接表征散装拓扑,并在改变从深度到浅的状态的淬火时确定新兴的动力学拓扑过渡。这项工作为拓扑量子阶段的完整研究打开了新的量子模拟途径。
Quantum simulation, as a state-of-art technique, provides the powerful way to explore topological quantum phases beyond natural limits. Nevertheless, a previously-not-realized three-dimensional (3D) chiral topological insulator, and demonstrate by quantum quenches a complete study of both the bulk and surface topological physics. First, a dynamical bulk-surface correspondence in momentum space is observed, showing that the bulk topology of the 3D phase uniquely corresponds to the nontrivial quench dynamics emerging on 2D momentum hypersurfaces called band inversion surfaces (BISs), equivalent to the bulk-boundary correspondence in real space. Further, the symmetry protection of the 3D chiral phase is uncovered by measuring dynamical spin textures on BISs, which exhibit perfect (broken) topology when the chiral symmetry is preserved (broken). Finally we measure the topological charges to characterize directly the bulk topology, and identify an emergent dynamical topological transition when varying the quenches from deep to shallow regimes. This work opens a new avenue of quantum simulation towards for the complete study of topological quantum phases.