C. Chardonnet et G. Millot
J. Phys. IV France 135 (2006) 33-41
Incoherent solitons and condensation processesA. Picozzi1, M. Haelterman2, S. Pitois1 and G. Millot1
1 Laboratoire de Physique de l'Université de Bourgogne, 9 Av. A. Savary, 21078 Dijon, France
2 50 avenue F.D. Roosevelt, Université Libre de Bruxelles, CP. 194/5, 1050 Bruxelles, Belgique
(Published online 23 November 2006)
We study the nonlinear interaction of partially incoherent nonlinear optical waves. We show that, in spite of the incoherence of the waves, coherent phase effects may play a relevant role during the propagation, in contrast with the usual wave turbulence description of the interaction. These nonlinear phase effects may lead the system to unexpected processes of self-organization, such as condensation, or incoherent soliton generation in instantaneous response nonlinear media. Such self-organization processes may be characterized by a reduction of the non-equilibrium entropy, which violates the Boltzmann's H-theorem of entropy growth inherent to the wave turbulence theory.
© EDP Sciences 2006