Fig. 1: The time vortex defect and the driven Kitaev honeycomb model.
From: Topological excitations at time vortices in periodically driven systems
a An illustration of the time vortex defect in space-time. b The driven Kitaev honeycomb model in the anomalous phase with periodic boundary conditions on the x-axis and open boundary conditions on the y-axis has chiral edge states. c The corresponding quasi-energy spectrum at Δt = 0.5T, \({{\mathcal{J}}}_{0}^{a}\Delta t=0.9\pi /4\).
