Phase diagram of the 3D quantum anisotropic XY model-A quantum Monte Carlo calculation

► We simulated the S=1 3D anisotropic XY model with SSE QMC algorithm. ► We obtained the phase diagram for the model and the quantum critical point Dc. ► Our results agrees better with previous work using the SCHA than with bond operator. ► We calculated zν using the gap from low temperature susceptibility decay. ► We used a finite size scaling approach to calculate zν from spin stiffness.