Sphaleron transition rate in lattice gluodynamics

The sphaleron transition rate in gluodynamics at the temperature $T/T_c=1.24$ has been calculated by lattice simulation. The calculations involve the Kubo formula, which relates the sphaleron transition rate to the correlation function of the topological charge density. The gradient flow method has been used to calculate the correlation function of the topological charge density. The Kubo formula has been inverted by the Backus-Gilbert method. The results have been compared to those obtained by other methods.