Stochastic processes originating in deterministic microscopic dynamics
Stochastic processes originating in deterministic microscopic dynamics
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起源于确定性微观动力学的随机过程
DOI:
10.1007/bf01012325
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发表时间:
1983
影响因子:
1.6
通讯作者:
J. Lebowitz
中科院分区:
文献类型:
--
作者:
D. Dürr;S. Goldstein;J. Lebowitz
We investigate the probability distribution of the scaled trajectory of a test particle moving in an equilibrium fluid according to the laws of classical mechanics, i.e., ifQ(t) is the displacement of the test particle we letQA(t) =Q(At)/√A and consider the distribution of the trajectory QA(t) in the limit A→∞. The randomness of the motion is due entirely to the randomness of the initial state of the fluid, test particle, or both, and the process is generally non-Markovian. Nevertheless, it can be proven in some cases and we expect it to be true in many more that QA (t) looks like Brownian motion in the limit A→∞. Some results for simple model systems are presented.