67 citations · 108 across the 14 of their papers we have counts for
14 papers
Fractional topology and multi-period re-quantization in open quantum systems
Xi Wu, Xiang Zhang, Fuxiang Li
We study fractional topological numbers in open quantum systems described by the Gorin--Kossakowski--Sudarsha--Lindblad master equation. Under symmetry conditions ensuring quantiza…
Loop unitary and phase band topological invariant in generic multi-band Chern insulators
Xi Wu, Ze Yang, Fuxiang Li
Quench dynamics of topological phases have been studied in the past few years and dynamical topological invariants are formulated in different ways. Yet most of these invariants ar…
Dynamical characterization of topological phases beyond the minimal models
Xi Wu, Panpan Fang, Fuxiang Li
Dynamical characterization of topological phases under quantum quench dynamics has been demonstrated as a powerful and efficient tool. Previous studies have been focused on systems…
Topological invariant of multilayer Haldane models with irregular stackings
Xi Wu
We study multilayer Haldane models with irregular type of stacking, considering the nearest interlayer hopping. We prove that the value of the topological invariant is equal to the…
Boundary Condition Analysis of First and Second Order Topological Insulators
Xi Wu, Taro Kimura
We analytically study boundary conditions of the Dirac fermion models on a lattice, which describe the first and second order topological insulators. We obtain the dispersion relat…
Multilayer Haldane model
Xi Wu, C. X. Zhang, M. A. Zubkov
We propose the model of layered materials, in which each layer is described by the conventional Haldane model, while the inter - layer hopping parameter corresponds to the ABC stac…