TY - JOUR
T1 - Superactivation of the Asymptotic Zero-Error Classical Capacity of a Quantum Channel
JF - IEEE Transactions on Information Theory
Y1 - 2011
A1 - Toby S. Cubitt
A1 - Jianxin Chen
A1 - Aram W. Harrow
AB - The zero-error classical capacity of a quantum channel is the asymptotic rate at which it can be used to send classical bits perfectly, so that they can be decoded with zero probability of error. We show that there exist pairs of quantum channels, neither of which individually have any zero-error capacity whatsoever (even if arbitrarily many uses of the channels are available), but such that access to even a single copy of both channels allows classical information to be sent perfectly reliably. In other words, we prove that the zero-error classical capacity can be superactivated. This result is the first example of superactivation of a classical capacity of a quantum channel.
VL - 57
U4 - 8114 - 8126
UR - http://arxiv.org/abs/0906.2547v3
CP - 12
J1 - IEEE Trans. Inform. Theory
U5 - 10.1109/TIT.2011.2169109
ER -