Topological Euler Class as a Dynamical Observable in Optical Lattices
Topological Euler Class as a Dynamical Observable in Optical Lattices
The last years have witnessed rapid progress in the topological characterization of out-of-equilibrium systems. We report on robust signatures of a new type of topology -- the Euler class -- in such a dynamical setting. The enigmatic invariant $(\xi)$ falls outside conventional symmetry-eigenvalue indicated phases and, in simplest incarnation, is …