An Extreme Form of Superactivation for Quantum Zero-Error Capacities
An Extreme Form of Superactivation for Quantum Zero-Error Capacities
The zero-error capacity of a channel is the rate at which it can send information perfectly, with zero probability of error, and has long been studied in classical information theory.We show that the zero-error capacity of quantum channels exhibits an extreme form of non-additivity, one which is not possible for …