Local and global well-posedness of the stochastic KdV-Burgers equation

Details Local and global well-posedness of the stochastic KdV-Burgers equation Local and global well-posedness of the stochastic KdV-Burgers equation

2011-09-22

arxiv.org/abs/1109.4926v1

Mathematics

Analysis of PDEs

39 pages

Scientific paper

The stochastic PDE known as the Kardar-Parisi-Zhang equation (KPZ) has been proposed as a model for a randomly growing interface. This equation can be reformulated as a stochastic Burgers equation. We study a stochastic KdV-Burgers equation as a toy model for this stochastic Burgers equation. Both of these equations formally preserve spatial white noise. We are interested in rigorously proving the invariance of white noise for the stochastic KdV-Burgers equation. This paper establishes a result in this direction. After smoothing the additive noise (by less than one spatial derivative), we establish (almost sure) local well-posedness of the stochastic KdV-Burgers equation with white noise as initial data. We also prove a global well-posedness result under an additional smoothing of the noise.

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