Multi-point distribution function for the continuous time random walk
Multi-point distribution function for the continuous time random walk
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DOI:
10.1088/1742-5468/2007/08/p08001
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发表时间:
2007-08-01
影响因子:
2.4
通讯作者:
Sokolov, I. M.
中科院分区:
文献类型:
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作者:
Barkai, E.;Sokolov, I. M.
We derive an explicit expression for the Fourier - Laplace transform of the two- point distribution function p( x(1), t(1); x(2), t(2)) of a continuous time random walk ( CTRW), thus generalizing the result of Montroll and Weiss for the singlepoint distribution function p( x(1), t(1)). The multi- point distribution function has a structure of a convolution of the Montroll - Weiss CTRW and the ageing CTRW single- point distribution functions. The correlation function x( t(1)) x( t(2)) for the biased CTRW process is found. The random walk foundation of the multi- time space fractional diffusion equation is investigated using the unbiased CTRW in the continuum limit.