Abstract:
We study the problem of the condensate (stochastic average) origination for an auxiliary field in the Kardar–Parisi–Zhang equation and its matrix generalization. We cannot reliably conclude that there is a condensate for the Kardar–Parisi–Zhang equation in the framework of the one-loop approximation improved by the renormalization group method. The matrix generalization of the Kardar–Parisi–Zhang equation permits a positive answer to the question of whether there is a nonzero condensate, and the problem can be solved exactly in the large-$N$ limit.
Citation:
L. V. Bork, S. L. Ogarkov, “The Kardar–Parisi–Zhang equation and its matrix generalization”, TMF, 178:3 (2014), 416–432; Theoret. and Math. Phys., 178:3 (2014), 359–373