Additivity of the entanglement of formation
Abstract
We address the question of whether the entanglement of formation is additive over tensor products of full matrix algebras, and derive a necessary and sufficient condition for optimality of vector states. By discussing two particular cases, we suggest that such a condition may be used either to prove or to find a counterexample to additivity.
 Publication:

Physical Review A
 Pub Date:
 April 2001
 DOI:
 10.1103/PhysRevA.63.042306
 arXiv:
 arXiv:quantph/0005126
 Bibcode:
 2001PhRvA..63d2306B
 Keywords:

 03.67.a;
 Quantum information;
 Quantum Physics;
 Mathematical Physics
 EPrint:
 4 pages, Latex, doublecolumn