Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-12-14
J. Phys.: Condens. Matter 17, S1995 (2005)
Physics
Condensed Matter
Statistical Mechanics
12 pages, 3 figures; Dedicated to Lothar Schaefer on the occasion of his 60th birthday
Scientific paper
10.1088/0953-8984/17/20/022
We study the transport properties of directed percolation clusters at the upper critical dimension $d_{c} = 4+1$, where critical fluctuations induce logarithmic corrections to the leading (mean-field) scaling behavior. Employing field theory and renormalization group methods we calculate these logarithmic corrections up to and including the next to leading correction for a variety of observables, viz. the connectivity, i.e., the probability that two given points are connected, the average two-point resistance and some of the fractal masses describing percolation clusters. Furthermore, we study logarithmic corrections for the multifractal moments of the current distribution on directed percolation clusters.
Janssen Hans-Karl
Stenull Olaf
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