Explicit solution of the optimal fluctuation problem for an elastic string in a random medium.


The free-energy distribution function of an elastic string in a quenched random potential, PL(F) , is investigated with the help of the optimal fluctuation approach. The form of the far-right tail of PL(F) is found by constructing the exact solution of the nonlinear saddle-point equations describing the asymptotic form of the optimal fluctuation. The… (More)

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