Distillability of non-positive-partial-transpose bipartite quantum states of rank four
Distillability of non-positive-partial-transpose bipartite quantum states of rank four
We show that a bipartite quantum state of rank four is distillable if its partial transpose has at least one negative eigenvalue; that is, the state is a non-positive-partial transpose (NPT). For this purpose we prove that if the partial transpose of a two-qutrit NPT state has at least two …