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arXiv 0705.2416math.PRmath-phmath.MP
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关于Z上有限程非对称排斥过程扩散系数的注记

A note on the diffusivity of finite-range asymmetric exclusion processes on Z

Jeremy Quastel, Benedek Valko

摘要:

具有非零漂移的有限程非对称排斥过程在$\mathbb Z$上的扩散系数$D(t)$是$t^{1/3}$阶的. Seppäläinen和Balázs最近证明了最近邻情况下的这个猜想。我们通过证明扩散系数的拉普拉斯变换具有严格的阶数,将他们的结果推广到一般的有限程排斥。我们还得到了正确阶下$D(t)$的逐点上界。

英文摘要:

The diffusivity $D(t)$ of finite-range asymmetric exclusion processes on $\mathbb Z$ with non-zero drift is expected to be of order $t^{1/3}$. Seppäläinen and Balázs recently proved this conjecture for the nearest neighbor case. We extend their results to general finite range exclusion by proving that the Laplace transform of the diffusivity is of the conjectured order. We also obtain a pointwise upper bound for $D(t)$ the correct order.

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