David P. DiVincenzo
Journal of Applied Physics
We show that there exist bipartite quantum states which contain a large locked classical correlation that is unlocked by a disproportionately small amount of classical communication. In particular, there are [Formula presented]-qubit states for which a one-bit message doubles the optimal classical mutual information between measurement results on the subsystems, from [Formula presented] bits to [Formula presented] bits. This phenomenon is impossible classically. However, states exhibiting this behavior need not be entangled. We study the range of states exhibiting this phenomenon and bound its magnitude. © 2004 The American Physical Society.
David P. DiVincenzo
Journal of Applied Physics
David P. DiVincenzo
Journal of Applied Physics
Charles H. Bennett, Patrick Hayden, et al.
IEEE Trans. Inf. Theory
Charles H. Bennett, David P. DiVincenzo, et al.
Physical Review Letters