For a quasi-periodic potential made of two incommensurate cosines, the effective diffusion constant equals D0 divided by the squared product of the zeroth-order modified Bessel functions of the arguments beta*Ua and beta*Ub.
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Brownian motion and generalized Lifson-Jackson formula in quasi-periodic systems
For a quasi-periodic potential made of two incommensurate cosines, the effective diffusion constant equals D0 divided by the squared product of the zeroth-order modified Bessel functions of the arguments beta*Ua and beta*Ub.