Complexity of waves in nonlinear disordered media

Details Complexity of waves in nonlinear disordered media Complexity of waves in nonlinear disordered media

2010-09-16

arxiv.org/abs/1009.3290v1

Phys. Rev. B 83, 134204 (2011)

Physics

Condensed Matter

Statistical Mechanics

20 pages, 11 Figures

Scientific paper

10.1103/PhysRevB.83.134204

The statistical properties of the phases of several modes nonlinearly coupled in a random system are investigated by means of a Hamiltonian model with disordered couplings. The regime in which the modes have a stationary distribution of their energies and the phases are coupled is studied for arbitrary degrees of randomness and energy. The complexity versus temperature and strength of nonlinearity is calculated. A phase diagram is derived in terms of the stored energy and amount of disorder. Implications in random lasing, nonlinear wave propagation and finite temperature Bose-Einstein condensation are discussed.

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