Yangian invariants and cluster adjacency in $ \mathcal{N} $ = 4 Yang-Mills

Abstract

We conjecture that every rational Yangian invariant in $ \mathcal{N} $ = 4 SYM theory satisfies a recently introduced notion of cluster adjacency. We provide evidence for this conjecture by using the Sklyanin Poisson bracket on Gr(4, n) to check numerous examples.