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arXiv 0904.1673cond-mat.dis-nncond-mat.stat-mech
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随机势中弹性弦最优涨落问题的显式解

Explicit solution of the optimal fluctuation problem for an elastic string in random potential

I. V. Kolokolov, S. E. Korshunov

摘要:

本文用最佳涨落方法研究了淬火随机势中弹性弦的自由能分布函数P(F)。通过构造描述最优涨落渐近形式的非线性鞍点方程的精确解,得到了P(F)的极右尾的形式。对于两种不同类型的边界条件和任意维数的嵌入空间1+d(d在0<d<2的范围内),得到了问题的解。所得结果也适用于d维Kardar-Parisi-Zhang方程描述的随机增长问题中高度分布函数的极左尾的描述。

英文摘要:

The free-energy distribution function of an elastic string in a quenched random potential, P(F), is investigated with the help of the optimal-fluctuation approach. The form of the far-right tail of P(F) is found by constructing the exact solution of the non-linear saddle-point equations describing the asymptotic form of the optimal fluctuation. The solution of the problem is obtained for two different types of boundary conditions and for an arbitrary dimension of the imbeding space 1+d with d from the interval 0<d<2. The results are also applicable for the description of the far-left tail of the height distribution function in the stochastic growth problem described by the d-dimensional Kardar-Parisi-Zhang equation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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