Holevo-Schumacher-Westmoreland channel capacity for a class of qudit unital channels
Journal Article
·
· Physical Review. A
- Institute for Quantum Information, Physics Department, California Institute of Technology 103-33, Pasadena, California 91125 (United States)
Using the unique nature of the average output state of an optimal signalling ensemble, we prove that for a special class of qudit unital channels, the Holevo-Schumacher-Westmoreland channel capacity is C=log{sub 2}(d)-min{sub {rho}}S(E({rho})), where d is the dimension of the qudit. The result is extended to products of the same class of unital qudit channels. Thus, the connection between the minimum von Neumann entropy at the channel output and the transmission rate for classical information over quantum channels extends beyond the qubit domain.
- OSTI ID:
- 20640694
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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