论文标题
非热雪崩效应：局部非扰动对Z2拓扑顺序引起的非扰动效应
Non-Hermitian Avalanche Effect: Non-Perturbative Effect Induced by Local Non-Hermitian Perturbation on a Z2 Topological Order
论文作者
论文摘要
在本文中，基于非静态曲折代码模型，我们出人意料地发现，基态的堕落性可以通过局部的非热扰动（即使是在热力学极限）上进行的。我们称其为非热雪崩效应。作为非炎症雪崩效应的物理学后果，borken降低了块状准粒子与拓扑保护的统一的退化基态之间的对应关系。此外，可以通过保真度敏感性观察到拓扑归化基态的PT对称性断裂过渡。
In this paper, based on a non-Hermitian toric-code model, we surprisingly find that the degeneracy of ground states can be changed by a local non-Hermitian perturbation (even in thermodynamic limit). We call it non-Hermitian avalanche effect. As the physics consequences of the non-Hermitian avalanche effect, a correspondence between bulk quasi-particles and topologically protected degenerate ground states for Z2 topological order is borken down. In addition, the PT symmetry breaking transition of the topologically degenerate ground states subspace can be observed by fidelity susceptibility.
