论文标题
与离散对称性相互作用的自旋链中没有定位
Absence of localization in interacting spin chains with a discrete symmetry
论文作者
论文摘要
我们证明，在镜子和自旋窗格对称性的组合下，旋转链对称性，并且具有非排定光谱显示在零总磁化和无限温度下显示有限的自旋转运。我们使用两个突出的示例在数值上证明了这一点：鲜明的多体定位系统和对称的多体定位系统。我们提供了所有能量密度的离域化的证据，并表明离域机制可以破坏对称性。我们使用结果来构建两个局部系统，当耦合时，它们相互离居。
We prove that spin chains symmetric under a combination of mirror and spin-flip symmetries and with a nondegenerate spectrum show finite spin transport at zero total magnetization and infinite temperature. We demonstrate this numerically using two prominent examples: the Stark many-body localization system and the symmetrized many-body localization system. We provide evidence of delocalization at all energy densities and show that the delocalization mechanism is robust to breaking the symmetry. We use our results to construct two localized systems which, when coupled, delocalize each other.
