Hauptseite > Publikationsdatenbank > Self-Trapping Self-Repelling Random Walks |
Journal Article | FZJ-2017-07802 |
2017
APS
College Park, Md.
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Please use a persistent id in citations: http://hdl.handle.net/2128/15985 doi:10.1103/PhysRevLett.119.140601
Abstract: Although the title seems self-contradictory, it does not contain a misprint. The model we study is aseemingly minor modification of the “true self-avoiding walk” model of Amit, Parisi, and Peliti in twodimensions. The walks in it are self-repelling up to a characteristic time T* (which depends on variousparameters), but spontaneously (i.e., without changing any control parameter) become self-trapping afterthat. For free walks, T* is astronomically large, but on finite lattices the transition is easily observable. Inthe self-trapped regime, walks are subdiffusive and intermittent, spending longer and longer times in smallareas until they escape and move rapidly to a new area. In spite of this, these walks are extremely efficient incovering finite lattices, as measured by average cover times.
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