Summability of joint cumulants of nonindependent lattice fields

Jani Lukkarinen, Matteo Marcozzi, Alessia Nota

We consider two nonindependent random fields $\psi$ and $\varphi$ defined on a countable set $Z$. For instance, $Z={\mathbb{Z}}^d$ or $Z={\mathbb{Z}}^d\times I$, where $I$ denotes a finite se…