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arXiv 0709.2284math.PR
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关于连续统中跳跃粒子平衡动力学生成元到生灭过程生成元的收敛性

On convergence of generators of equilibrium dynamics of hopping particles to generator of a birth-and-death process in continuum

E. Lytvynov, P. T. Polara

摘要:

本文研究了连续介质中无穷粒子系统的两类平衡随机动力学:跳跃粒子(也称为Kawasaki动力学),即,每个粒子在空间上随机跳跃的动力学,以及连续统中的生灭过程(或Glauber动力学),即,一种没有粒子运动的动力学,而是粒子随机死亡或出生。我们证明了广泛的一类Glauber动力学可以推导出川崎动力学的标度极限。更确切地说,我们证明了各自的发电机上的一组圆柱函数的收敛性,在$L^2$ -规范的不变测度的过程。后者的措施被认为是吉布斯措施对应的潜在的对相互作用,在低活性高温制度。我们的结果推广了[Finkelshtein D.L.例如,出现在《随机行动》里随机方程],证明了这是一个特殊的Glauber(Kawasaki,分别)动力学。

英文摘要:

We deal with two following classes of equilibrium stochastic dynamics of infinite particle systems in continuum: hopping particles (also called Kawasaki dynamics), i.e., a dynamics where each particle randomly hops over the space, and birth-and-death process in continuum (or Glauber dynamics), i.e., a dynamics where there is no motion of particles, but rather particles die, or are born at random. We prove that a wide class of Glauber dynamics can be derived as a scaling limit of Kawasaki dynamics. More precisely, we prove the convergence of respective generators on a set of cylinder functions, in the $L^2$-norm with respect to the invariant measure of the processes. The latter measure is supposed to be a Gibbs measure corresponding to a potential of pair interaction, in the low activity-high temperature regime. Our result generalizes that of [Finkelshtein D.L. et al., to appear in Random Oper. Stochastic Equations], which was proved for a special Glauber (Kawasaki, respectively) dynamics.

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