Classical capacity of a noiseless quantum channel assisted by noisy entanglement

Michal Horodecki, Pawel Horodecki, Ryszard Horodecki, Debbie W. Leung, Barbara M. Terhal

Research output: Contribution to journalArticleScientificpeer-review

57 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)70-78
Number of pages9
JournalQuantum Information and Computation
Volume1
Issue number3
Publication statusPublished - 2001
Externally publishedYes

Keywords

  • Capacity of a quantum channel
  • Quantum entanglement
  • Superdense coding

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