Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1998-10-23
J. Phys. A: Math. Gen. 32, 1809--17 (1999)
Physics
Condensed Matter
Statistical Mechanics
12 pages, LaTeX (IOP style), 7 figures included
Scientific paper
10.1088/0305-4470/32/10/003
Using field-theoretic renormalization group methods we calculate the equation of state for non-equilibrium systems belonging to the universality class of directed percolation (Gribov process) to second order in epsilon = 4-d. By introducing a parametric representation the result can be written to this order in a very simple form. We use our result to obtain a universal amplitude ratio to second order in epsilon.
Janssen Hans-Karl
Kutbay Ue.
Oerding Klaus
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