Extreme points of the set of density matrices with positive partial transpose

Jon Magne Leinaas, Jan Myrheim, Eirik Ovrum

Published 2007-04-25Version 1

We present a necessary and sufficient condition for a finite dimensional density matrix to be an extreme point of the convex set of density matrices with positive partial transpose with respect to a subsystem. We also give an algorithm for finding such extreme points and illustrate this by some examples.