Quasiequilibria in one-dimensional self-gravitating many-body systems.
Quasiequilibria in one-dimensional self-gravitating many-body systems.
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一维自引力多体系统中的准平衡。
DOI：
10.1103/physreve.50.2607
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Gouda
中科院分区：
文献类型：
--
作者：
Tsuchiya;Konishi;Gouda
研究了一维自引力多体系统的微观动力学。我们考察了以等温水袋分布或静止水袋分布为初始条件的两个演化过程。我们研究了系统向热平衡的演化。结果表明，随着系统自由度的增加，水袋分布趋于准平衡，系统的随机性降低。这些结果表明，系统的相空间实际上不是遍历的，具有大自由度的系统接近于近可积系统。
The microscopic dynamics of one-dimensional self-gravitating many-body systems is studied. We examine two courses of the evolution that have the isothermal or stationary water-bag distribution as initial conditions. We investigate the evolution of the systems toward thermal equilibrium. It is found that when the number of degrees of freedom of the system is increased, the water-bag distribution becomes a quasiequilibrium, and the stochasticity of the system reduces. These results suggest that the phase space of the system is effectively not ergodic and the system with large degrees of freedom approaches the near-integrable one.