The Vlasov equation and the Hamiltonian Mean-Field model

The Vlasov equation and the Hamiltonian Mean-Field model
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Vlasov 方程和哈密顿平均场模型

DOI:
10.1016/j.physa.2006.01.005
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发表时间:
2005
影响因子:
3.3
通讯作者:
Y. Yamaguchi
Y. Yamaguchi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
J. Barr'e;F. Bouchet;T. Dauxois;S. Ruffo;Y. Yamaguchi

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我们表明,在N粒子动力学的哈密顿平均场(HMF)模型中观察到的均匀(零磁化)状态的准定态,但弗拉索夫稳定的均匀状态。在不同的初始动量分布下,存在无穷多个Vlasov稳定的均匀态。Tsallis q-指数的动量,齐次的角度,分布函数是可能的,但是,他们并不特殊,在任何方面,在一个无限的人。所有的弗拉索夫稳定的均匀状态失去稳定性,因为有限的N效应,弛豫时间发散与粒子数的幂律后,系统收敛到玻尔兹曼-吉布斯平衡。
We show that the quasi-stationary states of homogeneous (zero magnetization) states observed in the N-particle dynamics of the Hamiltonian mean-field (HMF) model are nothing but Vlasov stable homogeneous states. There is an infinity of Vlasov stable homogeneous states corresponding to different initial momentum distributions. Tsallis q-exponentials in momentum, homogeneous in angle, distribution functions are possible, however, they are not special in any respect, among an infinity of others. All Vlasov stable homogeneous states lose their stability because of finite N effects and, after a relaxation time diverging with a power-law of the number of particles, the system converges to the Boltzmann–Gibbs equilibrium.
相互作用的布朗粒子的零温度限制,II._一维凝固。
DOI: --
发表时间: 2004
期刊: Ann. Probab. 32
影响因子: --
作者:
Hiromitsu Suetani;Takehiko Horita;Shin Mizutani;T.Funaki
通讯作者: T.Funaki