RT Journal Article
T1 Superactivation of the Asymptotic Zero-Error Classical Capacity of a Quantum Channel
A1 Cubitt, Toby Stanly
A1 Chen, Jianxin;
A1 Harrow, Aram W.
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.
PB Institute of Electrical and Electronics Engineers
SN 0018-9448
YR 2011
FD 2011
LK https://hdl.handle.net/20.500.14352/42130
UL https://hdl.handle.net/20.500.14352/42130
LA eng
NO Leverhulme early-career fellowship
NO China Scholarship Council
DS Docta Complutense
RD 6 abr 2025