Fig. 4
From: Observation of emergent momentum–time skyrmions in parity–time-symmetric non-unitary quench dynamics
Experimental results of spin texture n(k, t). Experimental (upper layer) and theoretical results (lower layer) of spin texture n(k, t) in the momentum–time space for quench processes corresponding to (a) Fig. 3a, and (b) Fig. 3b, respectively. The temporal resolution of experimental measurements is limited by discrete time steps of QWs, whereas we apply a better resolution in theoretical results for a clearer view of skyrmions. The spin textures are colored according to n3(k, t) and fixed points are indicated by dashed lines
