  We investigate by means of the time-dependent Gutzwiller approximation the
out-of-equilibrium dynamics of an antiferromagnetic state evolved with the
Hubbard model Hamiltonian after a sudden change of the repulsion strength $U$.
We find that magnetic order survives more than what expected on the basis of
thermalization arguments, in agreement with recent DMFT calculations. In
addition, we find evidence of a dynamical transition for quenches to large
values of $U$ between a coherent antiferromagnet characterized by a finite
quasiparticle residue to an incoherent one with vanishing residue, that finally
turns into a paramagnet for even larger $U$.
