Coarse graining of master equations with fast and slow states

Details Coarse graining of master equations with fast and slow states Coarse graining of master equations with fast and slow states

2008-01-23

arxiv.org/abs/0801.3628v2

J. Chem. Phys. 128, 154114 (2008)

Physics

Condensed Matter

Soft Condensed Matter

9 pages, 9 figures, final version (new subsection and many minor improvements)

Scientific paper

10.1063/1.2907242

We propose a general method for simplifying master equations by eliminating from the description rapidly evolving states. The physical recipe we impose is the suppression of these states and a renormalization of the rates of all the surviving states. In some cases, this decimation procedure can be analytically carried out and is consistent with other analytical approaches, like in the problem of the random walk in a double-well potential. We discuss the application of our method to nontrivial examples: diffusion in a lattice with defects and a model of an enzymatic reaction outside the steady state regime.

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