Front Cover: Nodes and Spin Windings for Topological Transitions in Light–Matter Interactions (Adv. Quantum Technol. 7/2023)

Abstract

In article number 2200177, Zu-Jian Ying extracts different levels of topological information and unveils abundant unconventional topological transitions (TTs) underlying level anticrossings in anisotropic light-matter interaction. The correspondence of wave-function nodes to spin windings is found as a physical support for single-qubit TTs. Various kinds of hidden knot transitions are also revealed in the sophisticate spin windings which often happen to be cartoon-like. Algebraic formulation is established to decode the topological information encoded geometrically in the wave functions and spin windings.

Topics & Concepts