## A note on extremal states of composite quantum systems with fixed marginals    [PDF]

S. Kanmani
An extremal element of the convex set of composite quantum states in $M_2\otimes M_3$, whose marginals are all normalised identities has been constructed. It is found to be a mixed state and is entangled as well.
View original: http://arxiv.org/abs/1304.5413