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arXiv 0907.3782cond-mat.stat-mechcond-mat.other
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Lévy稳定噪声驱动的相变:非线性分数阶Fokker-Planck方程的精确解及稳定性分析

Phase transitions driven by Lévy stable noise: exact solutions and stability analysis of nonlinear fractional Fokker-Planck equations

Akihisa Ichiki, Masatoshi Shiino

摘要:

相变和外界噪声对许多物体系统的影响是物理学的主要课题之一。在布朗噪声驱动的平均场耦合非线性随机动力系统中,可能出现包括非平衡态在内的各种类型的相变。布朗运动是Lévy运动的一种特殊情况,基于Lévy运动的随机过程是研究合作现象的一种选择。近年来,与Lévy噪声相关的分数阶Fokker-Planck方程引起了人们的广泛关注,双势阱系统在Lévy噪声作用下的行为也得到了深入的研究.然而,大多数这样的研究都诉诸于数值计算。我们构造了一个{ \it解析可解模型}来研究由Lévy稳定噪声驱动的相变的发生。

英文摘要:

Phase transitions and effects of external noise on many body systems are one of the main topics in physics. In mean field coupled nonlinear dynamical stochastic systems driven by Brownian noise, various types of phase transitions including nonequilibrium ones may appear. A Brownian motion is a special case of Lévy motion and the stochastic process based on the latter is an alternative choice for studying cooperative phenomena in various fields. Recently, fractional Fokker-Planck equations associated with Lévy noise have attracted much attention and behaviors of systems with double-well potential subjected to Lévy noise have been studied intensively. However, most of such studies have resorted to numerical computation. We construct an {\it analytically solvable model} to study the occurrence of phase transitions driven by Lévy stable noise.

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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