Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2005-10-21
Physics
Condensed Matter
Statistical Mechanics
To appear in Phys. Rev. E
Scientific paper
10.1103/PhysRevE.72.061103
A number of results for reactions involving subdiffusive species all with the same anomalous exponent gamma have recently appeared in the literature and can often be understood in terms of a subordination principle whereby time t in ordinary diffusion is replaced by t^gamma. However, very few results are known for reactions involving different species characterized by different anomalous diffusion exponents. Here we study the reaction dynamics of a (sub)diffusive particle surrounded by a sea of (sub)diffusive traps in one dimension. We find rigorous results for the asymptotic survival probability of the particle in most cases, with the exception of the case of a particle that diffuses normally while the anomalous diffusion exponent of the traps is smaller than 2/3.
Lindenberg Katja
Yuste Santos B.
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