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Quantum
Information and Computation
ISSN: 1533-7146
published since 2001
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Vol.1 No.3, October 2001 |
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Classical
capacity of a noiseless quantum channel assisted by noisy entanglement
(pp70-78)
Michal Horodecki, Pawel Horodecki, Ryszard Horodecki, Debbie Leung, and
Barbara Terhal
doi:
https://doi.org/10.26421/QIC1.3-6
Abstracts:
We derive the general formula for the capacity of a
noiseless quantum channel assisted by an arbitrary amount of noisy entanglement.
In this capacity formula, the ratio of the quantum mutual information
and the von Neumann entropy of the sender's share of the noisy
entanglement plays the role of mutual information in the completely
classical case. A consequence of our results is that bound entangled
states cannot increase the capacity of a noiseless quantum channel.
Key words:
capacity of a quantum channel, quantum entanglement, superdense coding |
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