Diffusion over a fluctuating barrier in underdamped dynamics.

Authors :: Mao JW
Shen CW
Source :: Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2011 Apr; Vol. 83 (4 Pt 1), pp. 041108. Date of Electronic Publication: 2011 Apr 11.
Publication Year :: 2011
Abstract: We apply a Langevin model by imposing additive and multiplicative noises to study thermally activated diffusion over a fluctuating barrier in underdamped dynamics. The barrier fluctuation is characterized by Gaussian colored noise with exponential correlation. We present the exact solutions for the first and second moments. Furthermore, we use direct simulations to calculate the asymptotic probability for a Brownian particle passing over the fluctuating barrier. The results indicate that the correlation of the fluctuating barrier is crucial for barrier crossing dynamics.<br /> (©2011 American Physical Society)

Subjects :: Computer Simulation
Diffusion
Membranes, Artificial
Models, Chemical
Models, Molecular
Solutions chemistry

Language :: English
ISSN :: 1550-2376
Volume :: 83
Issue :: 4 Pt 1
Database :: MEDLINE
Journal :: Physical review. E, Statistical, nonlinear, and soft matter physics
Publication Type :: Academic Journal
Accession number :: 21599116
Full Text :: https://doi.org/10.1103/PhysRevE.83.041108