dorsal/arxiv
View SchemaBidirectional coherent classical communication
| Authors | Aram W. Harrow, Debbie W. Leung |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0412126 |
| URL | https://arxiv.org/abs/quant-ph/0412126 |
| Journal | Quantum Information and Computation, vol. 5, no. 4-5, pp. 380-395 (2005) |
Abstract
A unitary interaction coupling two parties enables quantum communication in both the forward and backward directions. Each communication capacity can be thought of as a tradeoff between the achievable rates of specific types of forward and backward communication. Our first result shows that for any bipartite unitary gate, coherent classical communication is no more difficult than classical communication -- they have the same achievable rate regions. Previously this result was known only for the unidirectional capacities (i.e., the boundaries of the tradeoff). We then relate the tradeoff curve for two-way coherent communication to the tradeoff for two-way quantum communication and the tradeoff for coherent communiation in one direction and quantum communication in the other.
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"abstract": "A unitary interaction coupling two parties enables quantum communication in\nboth the forward and backward directions.\n Each communication capacity can be thought of as a tradeoff between the\nachievable rates of specific types of forward and backward communication.\n Our first result shows that for any bipartite unitary gate, coherent\nclassical communication is no more difficult than classical communication --\nthey have the same achievable rate regions. Previously this result was known\nonly for the unidirectional capacities (i.e., the boundaries of the tradeoff).\n We then relate the tradeoff curve for two-way coherent communication to the\ntradeoff for two-way quantum communication and the tradeoff for coherent\ncommuniation in one direction and quantum communication in the other.",
"arxiv_id": "quant-ph/0412126",
"authors": [
"Aram W. Harrow",
"Debbie W. Leung"
],
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"quant-ph"
],
"journal_ref": "Quantum Information and Computation, vol. 5, no. 4-5, pp. 380-395\n (2005)",
"title": "Bidirectional coherent classical communication",
"url": "https://arxiv.org/abs/quant-ph/0412126"
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