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Название: Partial Absorption and "Virtual" Traps
Авторы: Ben-Naim E., Redner S., Weiss G.H.
Аннотация:
The virtual trap approach is readily generalized to higher dimensions. This allows one to obtain the density profile of diffusing particles around a partially absorbing spherical trap. An unusual crossover between short-time penetration and long-time trapping occurs in two dimensions; the size of the virtual trap is exponentially small in the case of weak absorption, corresponding to an absorption time which is exponentially large.