Multicriticality in a one-dimensional topological band insulator

一维中拓扑强化的Lifshitz多临界性

Topologically Enforced Lifshitz Multicriticality in One Dimension

本文在一维手性对称费米子系统中构建了一类拓扑强化的Lifshitz多临界点，该多临界性仅由相邻临界线拓扑变化驱动，并展现出拓扑简并但体边界对应关系失效的现象。

Curvature function renormalisation, topological phase transitions and multicriticality

A recently proposed curvature renormalization group scheme for topological phase transitions defines a generic `curvature function' as a function of the parameters of the theory and shows that topological phase transitions are signalled by the divergence of this function at certain parameters values, called critical points, in analogy with usual phase transitions. A renormalization group procedure was also introduced as a way of flowing away from the critical point towards a fixed point, where an appropriately defined correlation function goes to zero and topological quantum numbers characteri…

从量子单分子到π-流扭形码的多临界性

From Quantum Dimers to the $π$-flux Toric Code via Deconfined Multicriticality

通过引入张量积正则化，将RK单分子模型与π-流扭形码连接，揭示了Z₂拓扑液体的多临界点，结合iDMRG和低能场论确定了相图中的三种相变。

具有幺正对称性的纯无能隙SPT相之间的多重临界性

Multicriticality between Purely Gapless SPT Phases with Unitary Symmetry

本研究通过qutrit三聚化XX链，发现三个不等价无能隙SPT相在c=2多重临界点相遇，并解析推导了其临界理论，为实验实现提供了候选模型。