The static Phi^4 model on the d-dimensional torus is a well-known toy
model in Euclidean quantum field theory. It is well-posed for d = 1,
and its renormalisation is well-understood for d = 2 and d = 3, thanks
to works by Glimm, Jaffe, and many others. In the dynamic case, the
model becomes a stochastic PDE, motivated by the idea of stochastic
quantization. It is well-posed for d = 1. A...