0 01 21 03 7 D ec 2 00 0 Existence of the upper criti cal dimension of the Kardar-Parisi-Zhang equation

The controversy whether or not the Kardar-Parisi-Zhang (KPZ) equation has an upper critical dimension (UCD) is going on for quite a long time. Some approximate integral equations for the two-point function served as an indication for the existence of a UCD, by obtaining a dimension, above which the equation does not have a strong coupling solution. A… CONTINUE READING