Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-05-19
Journal of Statistical Physics 118: 511-530 (2005)
Physics
Condensed Matter
Statistical Mechanics
11 pages
Scientific paper
10.1007/s10955-004-8819-z
We calculate the time-evolution of a discrete-time fragmentation process in which clusters of particles break up and reassemble and move stochastically with size-dependent rates. In the continuous-time limit the process turns into the totally asymmetric simple exclusion process (only pieces of size 1 break off a given cluster). We express the exact solution of master equation for the process in terms of a determinant which can be derived using the Bethe ansatz. From this determinant we compute the distribution of the current across an arbitrary bond which after appropriate scaling is given by the distribution of the largest eigenvalue of the Gaussian unitary ensemble of random matrices. This result confirms universality of the scaling form of the current distribution in the KPZ universality class and suggests that there is a link between integrable particle systems and random matrix ensembles.
Rákos Attila
Schütz Gunter M.
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