Coupling Reduces Noise
  We demonstrate how coupling nonlinear dynamical systems can reduce the effects of noise. For simplicity we investigate noisy coupled map lattices. Noise from different lattice nodes can diffuse across the lattice and lower the noise level of individual nodes. We develop a theoretical model that explains this observed noise evolution and show how the coupled dynamics can naturally function as an averaging filter. Our numerical simulations are in excellent agreement with the model predictions. 
Behnam Kia, Sarvenaz Kia, John F. Lindner, Sudeshna Sinha, William L.   Ditto
nlin.CD