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We investigate non-equilibrium properties of the frustrated Heisenbergantiferromagnets on the triangular lattice. Nonequilibrium critical relaxationof frustrated Heisenberg antiferromagnets shows a dynamic transition (or, atleast, sharp crossover) at the same temperature $T_{\rm u}=0.282 J$ as forstatic properties due to unbinding of $\mathbb{Z}_2$-vortices. We show thatstarting from the high-temperature initial state, due to presence of$\mathbb{Z}_2$-vortices in the considering system, in a broad temperature range$T<T_{\rm u}$ the dynamic properties in the intermediate time range are similarto those of two-dimensional XY model below Berezinskii-Kosterlitz-Thoulesstransition. The interaction of $\mathbb{Z}_2$-vortices with spin-wave degreesof freedom does not emerge until rather long times.

physical review. b./physical review. b

Universal Berezinskii-Kosterlitz-Thouless dynamic scaling in the  intermediate timerange in frustrated Heisenberg antiferromagnets on  triangular lattice