Dynamical Structure Factor of Z2 Topological Spin Liquid

Employing large-scale quantum Monte Carlo simulations and the recently developed stochastic analytic continuation technique, we systematically investigate the dynamical information of in Z2 topological spin liquid realized in the Balents-Fisher-Girvin XXZ spin model. In particular, we for the first time observe the evolution of dynamical spin-spin correlation functions, through the the continuous transitions from spin liquid to symmetry breaking phases. We find symmetry fractionalization of the vison excitations can be revealed from spectral information, and hence provide evidence for experimentally accessible detections of topological order and the associated symmetry fractionalization.