Critical Discussion of the 2-Loop Calculations for the KPZ-Equation

Details Critical Discussion of the 2-Loop Calculations for the KPZ-Equation Critical Discussion of the 2-Loop Calculations for the KPZ-Equation

1997-06-02

arxiv.org/abs/cond-mat/9706009v2

Phys. Rev. E 56 (1997) 5013

Physics

Condensed Matter

Rev-TeX. Some changes in the representation, conclusions unchanged

Scientific paper

10.1103/PhysRevE.56.5013

In this article, we perform a careful analysis of the renormalization procedure used in existing calculations to derive critical exponents for the KPZ-equation at 2-loop order. This analysis explains the discrepancies between the results of the different groups. The correct critical exponents in d=2+epsilon dimensions at the crossover between weak- and strong-coupling regime are zeta=O(epsilon^3) and z=2+O(epsilon^3). No strong-coupling fixed point exists at 2-loop order.

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