Collective behaviour in electrical dipolar systems

This paper reports a new wave phenomenon. We show that in a system consisti ng of many electric dipoles, the interaction between dipoles, mediated by r adiated electromagnetic waves, leads to a kind of phase transition in the s ystem. When the phase transition occurs, all dipoles tend to oscillate in p hase, displaying a global coherent behaviour. It is also found that this fe ature is independent of the precise configuration of the dipole system.