MULTIBARRIER CROSSING REGULATED BY THE FRICTION

被引:19
作者
MORO, GJ
POLIMENO, A
机构
[1] Dipartimento di Chimica Fisica, Università di Padova, 35131 Padua
关键词
D O I
10.1016/0009-2614(92)85111-M
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In the presence of saddle points having the same energy, multi-barrier transitions, which normally are quenched in the over-damped regime, become allowed when the friction is small enough. The model described by the Fokker-Planck equation for the angle and its velocity with a fourfold potential is examined in order to illustrate the role of the friction in the multi-barrier crossing. Both exact numerical calculations and asymptotic analysis of the Fokker-Planck equation are performed. Some general conclusions are drawn for the butane isomerization.
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页码:133 / 137
页数:5
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