Short Time Large Deviations of the KPZ Equation

@article{Lin2020ShortTL,
  title={Short Time Large Deviations of the KPZ Equation},
  author={Yier Lin and Li-Cheng Tsai},
  journal={arXiv: Probability},
  year={2020}
}
We establish the Freidlin--Wentzell Large Deviation Principle (LDP) for the Stochastic Heat Equation with multiplicative noise in one spatial dimension. That is, we introduce a small parameter $ \sqrt{\varepsilon} $ to the noise, and establish an LDP for the trajectory of the solution. Such a Freidlin--Wentzell LDP gives the short-time, one-point LDP for the KPZ equation in terms of a variational problem. Analyzing this variational problem under the narrow wedge initial data, we prove a… 
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