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A zero temperature quench of the Ising model is known to lead to a frozen steady state on random and small world networks. We study such quenches on random scale-free (RSF) networks and compare the scenario with that in the Barabási–Albert (BA) network and the Watts Strogatz (WS) addition-type network. While frozen states are present in all the cases, the RSF shows an order–disorder phase transition of mean field nature as in the WS model as well as the existence of two absorbing phases separated by an active phase. The WS network also shows an active-absorbing (A–A) phase transition occurring at the known order–disorder transition point. The comparison of the RSF and the BA network results show interesting difference in finite size dependence.

Frozen states and active-absorbing phase transitions of the Ising model on networks