Entropy Bound for the Classical Capacity of a Quantum Channel Assisted by Classical Feedback
We prove that the classical capacity of an arbitrary quantum channel assisted by a free classical feedback channel is bounded from above by the maximum average output entropy of the quantum channel. As a consequence of this bound, we conclude that a classical feedback channel does not improve the cl...
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| Format: | Article |
| Language: | English |
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IEEE
2020
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| Online Access: | https://hdl.handle.net/1721.1/126673 |