Directly Measuring the Winding Number in Photonic Discrete Time Quantum Walks
Xiao-Ye Xu, Qinqin Wang, Chuan‐Feng Li · 2019
Topological phases determined by the system’s ground state can be completely classified by topological invariants. By fully reconstructing the final wave function, we report a dynamical method for measuring the topological invariants in photonic quantum walks.