Random perturbations of 2-dimensional hamiltonian flows
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- Koralov, L. Probab. Theory Relat. Fields (2004) 129: 37. doi:10.1007/s00440-003-0320-0
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We consider the motion of a particle in a periodic two dimensional flow perturbed by small (molecular) diffusion. The flow is generated by a divergence free zero mean vector field. The long time behavior corresponds to the behavior of the homogenized process - that is diffusion process with the constant diffusion matrix (effective diffusivity). We obtain the asymptotics of the effective diffusivity when the molecular diffusion tends to zero.