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arXiv 1003.5970cond-mat.stat-mech
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长距离互动的恶性步行

Vicious walks with long-range interactions

Igor Goncharenko, Ajay Gopinathan

摘要:

具有短程相互作用的恶性游走的生存或团聚概率的渐近行为通常被很好地研究。然而,在许多现实的过程中,行走与长程势相互作用,该长程势在$d$维中衰减,距离$r$为$r^{-d-σ}$。我们采用重整化场论的方法来研究这种长程相互作用的影响。我们计算,为第一次,指数描述的所有值的参数$σ$和$d$的生存概率的衰减到一阶在$ε=2-d$和$δ=2-d-σ$的双重扩展。我们发现,有几个区域中的$σ-d$平面对应于不同的缩放生存和团聚概率。此外,我们还首次计算了前导对数修正。

英文摘要:

The asymptotic behaviour of the survival or reunion probability of vicious walks with short-range interactions is generally well studied. In many realistic processes, however, walks interact with a long ranged potential that decays in $d$ dimensions with distance $r$ as $r^{-d-σ}$. We employ methods of renormalized field theory to study the effect of such long range interactions. We calculate, for the first time, the exponents describing the decay of the survival probability for all values of parameters $σ$ and $d$ to first order in the double expansion in $ε=2-d$ and $δ=2-d-σ$. We show that there are several regions in the $σ-d$ plane corresponding to different scalings for survival and reunion probabilities. Furthermore, we calculate the leading logarithmic corrections for the first time.

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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