Towards mesoscopic ergodic theory
Towards mesoscopic ergodic theory
复制标题
迈向介观遍历理论
DOI:
10.1007/s11425-019-1642-5
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发表时间:
2020-08
期刊:
影响因子:
--
通讯作者:
Yi Yingfei
中科院分区:
文献类型:
--
作者:
Qi Weiwei;Shen Zhongwei;Wang Shirou;Yi Yingfei
The present paper is devoted to a preliminary study towards the establishment of an ergodic theory for stochastic differential equations (SDEs) with less regular coefficients and degenerate noises. These equations are often derived as mesoscopic limits of complex or huge microscopic systems. By studying the associated Fokker-Planck equation (FPE), we prove the convergence of the time average of globally defined weak solutions of such an SDE to the set of stationary measures of the FPE under Lyapunov conditions. In the case where the set of stationary measures consists of a single element, the unique stationary measure is shown to be physical. Similar convergence results for the solutions of the FPE are established as well. Some of our convergence results, while being special cases of those contained in Ji et al. (2019) for SDEs with periodic coefficients, have weaken the required Lyapunov conditions and are of much simplified proofs. Applications to stochastic damping Hamiltonian systems and stochastic slow-fast systems are given.
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影响因子:
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DOI:
10.1007/978-3-540-68829-7_21
发表时间:
2012
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期刊:
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影响因子:
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DOI:
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