Based on the residue theorem and degenerate perturbation theory,we derive a new,simple and general formula for Berry pha......

The electronic states in normal graphene monolayer(GML)and graphene bilayer(GBL)exhibit the Berry phases of π and 2π r......

提出了一种两个二能级原子与单模非线性光场相互作用的非线性Tavis-Cummings模型，分析了它与其他腔量子电动力学(QED)模型之间的关......

　　Berry phase physics is closely related to a number of topological states of matter.Recently discovered topological s......

　　Thanks to recent progress in engineering two-dimensional topological band structure with cold atoms,we study a Stuck......