Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2006-12-11
Phys. Rev. E v.75 051110 (2007)
Physics
Condensed Matter
Statistical Mechanics
8 pages, 12figures
Scientific paper
10.1103/PhysRevE.75.051110
The raise and peel model describes the stochastic model of a fluctuating interface separating a substrate covered with clusters of matter of different sizes, and a rarefied gas of tiles. The stationary state is obtained when adsorption compensates the desorption of tiles. This model is generalized to an interface with defects (D). The defects are either adjacent or separated by a cluster. If a tile hits the end of a cluster with a defect nearby, the defect hops at the other end of the cluster changing its shape. If a tile hits two adjacent defects, the defect annihilate and are replaced by a small cluster. There are no defects in the stationary state. This model can be seen as describing the reaction D + D -->0, in which the particles (defects) D hop at long distances changing the medium and annihilate. Between the hops the medium also changes (tiles hit clusters changing their shapes). Several properties of this model are presented and some exact results are obtained using the connection of our model with a conformal invariant quantum chain.
Alcaraz Francisco Castilho
Rittenberg Vladimir
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