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Updated: Apr 18, 2026

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Published on: February 22, 2018
Strong-coupling phases of the anisotropic Kardar-Parisi-Zhang equation
Thomas Kloss1, Léonie Canet2, Nicolás Wschebor3
1IIP, Universidade Federal do Rio Grande do Norte, Av. Odilon Gomes de Lima 1722, 59078-400 Natal, Brazil.
Abstract:
We study the anisotropic Kardar-Parisi-Zhang equation using nonperturbative renormalization group methods. In contrast to a previous analysis in the weak-coupling regime, we find the strong-coupling fixed point corresponding to the isotropic rough phase to be always locally stable and unaffected by the anisotropy even at noninteger dimensions. Apart from the well-known weak-coupling and the now well-established isotropic strong-coupling behavior, we find an anisotropic strong-coupling fixed point for nonlinear couplings of opposite signs at noninteger dimensions.
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