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arXiv 1205.5000cond-mat.stat-mechhep-th
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分数阶动力学方程控制系统的临界动力学

Critical dynamics in systems controlled by fractional kinetic equations

L. A. Batalov, A. A. Batalova

摘要:

这篇文章致力于研究在临界点附近具有反常标度的系统的动力学。研究了具有$φ^3$非线性项的Lanvevin型分数阶随机方程.通过类比模型A,建立了场论模型,并计算了其传播子。新的作用泛函在坐标表示中的非局部性是由分数阶空间导数的引入引起的。证明了新模型是乘法可重正化的,并给出了单圈近似下的Gell-Man-Low函数。在超扩散的$\varepsilon$ -展开的框架中建立标度行为的存在性。

英文摘要:

The article is devoted to the dynamics of systems with an anomalous scaling near a critical point. The fractional stochastic equation of a Lanvevin type with the $φ^3$ nonlinearity is considered. By analogy with the model A the field theoretic model is built, and its propagators are calculated. The nonlocality of the new action functional in the coordinate representation is caused by the involving of the fractional spatial derivative. It is proved that the new model is multiplicatively renormalizable, the Gell-Man-Low function in the one-loop approximation is evaluted. The existence of the scaling behavior in the framework of the $\varepsilon$-expansion for a superdiffusion is established.

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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