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    An annihilating-branching particle model for the heat equation with average temperature zero

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    Date
    2005
    Author
    Burdzy, Krzysztof
    Quastel, Jeremy
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    Abstract
    We consider two species of particles performing random walks in a domain in [Real numbers] [superscript] d with reflecting boundary conditions, which annihilate on contact. In addition there is a conservation law so that the total number of particles of each type is preserved: When the two particles of different species annihilate each other, particles of each species, chosen at random, give birth. We assume initially equal numbers of each species and show that the system has a diffusive scaling limit in which the densities of the two species are well approximated by the positive and negative parts of the solution of the heat equation normalized to have constant L [superscript] 1 norm. In particular, the higher Neumann eigenfunctions appear as
    URI
    http://hdl.handle.net/1773/2134
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    • EPrint Collection - Mathematics [112]

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