Zero-Error Capacity of a Quantum Channel
The zero-error capacity of a discrete classical channel was first defined by Shannon as the least upper bound of rates for which one transmits information with zero probability of error. Here, we extend the concept of zero-error capacity for a noisy quantum channel. The necessary requirement for a quantum channel have zero-error capacity greater than zero is given. Finally, we give some directions on how to calculate the zero-error capacity of such channels.
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