Small mass asymptotic for the motion with vanishing friction
Small mass asymptotic for the motion with vanishing friction
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小质量渐近摩擦力消失的运动
DOI:
10.1016/j.spa.2012.08.013
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发表时间:
2012
影响因子:
1.4
通讯作者:
A. Wentzell
中科院分区:
文献类型:
--
作者:
M. Freidlin;Wenqing Hu;A. Wentzell
We consider the small mass asymptotic (Smoluchowski–Kramers approximation) for the Langevin equation with a variable friction coefficient. The friction coefficient is assumed to be vanishing within certain region. We introduce a regularization for this problem and study the limiting motion for the 1-dimensional case and a multidimensional model problem. The limiting motion is a Markov process on a projected space. We specify the generator and the boundary condition of this limiting Markov process and prove the convergence.