Universal bounds for the Holevo quantity, coherent information, and the Jensen-Shannon divergence
The mutual information between the sender of a classical message encoded in quantum carriers and a receiver is fundamentally limited by the Holevo quantity. Using strong subadditivity of entropy, we prove that the Holevo quantity is not larger than an exchange entropy. This implies an upper bound fo...
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| Veröffentlicht in: | Physical review letters 2010-07, Vol.105 (4), p.040505-040505, Article 040505 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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