Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2002-08-21
J. Phys. A: Math. Gen. (2002) 35 10503
Physics
Condensed Matter
Statistical Mechanics
18 pages, no figures. Uses IOP Latex class
Scientific paper
10.1088/0305-4470/35/49/301
We consider the survival probability of a particle in the presence of a finite number of diffusing traps in one dimension. Since the general solution for this quantity is not known when the number of traps is greater than two, we devise a perturbation series expansion in the diffusion constant of the particle. We calculate the persistence exponent associated with the particle's survival probability to second order and find that it is characterised by the asymmetry in the number of traps initially positioned on each side of the particle.
Blythe Richard A.
Bray Alan J.
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