Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-01-05
Physics
Condensed Matter
Statistical Mechanics
Scientific paper
In this paper we derive a general expression for the transmission coefficient using the method of reactive flux for a particle coupled to a harmonic bath surmounting a one dimensional inverted parabolic barrier. Unlike Kohen and Tannor [J. Chem. Phys. 103, 6013 (1995)] we use a normal mode analysis where the unstable and the other modes have a complete physical meaning. Importantly our approach results a very general expression for the time dependent transmission coefficient not restricted to overdamped limit. Once the spectral density for the problem is know one can use our formula to evaluate the time dependent transmission coefficient. We have done the calculations with time dependent friction used by Xie [Phys. Rev. Lett 93, 180603 (2004)] and also the one used by Kohen and Tannor [J. Chem. Phys. 103, 6013 (1995)]. Like the formula of Kohen and Tannor our formula also reproduces the results of transition state theory as well as the Kramers theory in the limits t->0 and t->infinity respectively.
No associations
LandOfFree
Exact analytical evaluation of time dependent transmission coefficient from the method of reactive flux for an inverted parabolic barrier does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Exact analytical evaluation of time dependent transmission coefficient from the method of reactive flux for an inverted parabolic barrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exact analytical evaluation of time dependent transmission coefficient from the method of reactive flux for an inverted parabolic barrier will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-15928