On the rank of extremal marginal states

Repana Devendra, Pankaj Dey, Santanu Dey

Let ${\rho }_1$ and ${\rho }_2$ be two states on ${\mathbb{C}}^{d_1}$ and ${\mathbb{C}}^{d_2}$ respectively. The marginal state space, denoted by $\mathcal{C}({\rho }_1,{\rho }_2)$, is the set of all states $…