Chaotic dynamics of SU(2) gauge fields in the presence of static charges

We have found in numerical simulations that the chaoticity of the classical hamiltonian lattice SU(2) gauge field system is reduced in the presence of static charges at the same total energy. The transition to non-chaotic behavior is rather sudden at a critical charge strength. The equipartition of chromoelectric and chromomagnetic energy takes place on a time scale essentially faster than the leading Lyapunov exponent.