Physics & Computer Science
Numerical simulations have been carried out for a pair of unidirectionally coupled identical pendula under the action of a common external ac torque. Both the master pendulum and the slave pendulum were in chaotic states. The only form of persistent locking appeared to be a computational artifact; otherwise the synchronization of slave to master was found to be intermittent.
Baker, Gregory L.; Blackburn, James A.; and Smith, H.J.T., "Intermittent Synchronization in a Pair of Coupled Chaotic Pendula" (1998). Physics and Computer Science Faculty Publications. 30.