dorsal/arxiv
View SchemaImplementation of generalized quantum measurements: superadditive quantum coding, accessible information extraction, and classical capacity limit
| Authors | M. Takeoka, M. Fujiwara, J. Mizuno, M. Sasaki |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0306034 |
| URL | https://arxiv.org/abs/quant-ph/0306034 |
| DOI | 10.1103/PhysRevA.69.052329 |
| Journal | Phys. Rev. A 69, 052329 (2004) |
Abstract
Quantum information theory predicts that when the transmission resource is doubled in quantum channels, the amount of information transmitted can be increased more than twice by quantum channel coding technique, whereas the increase is at most twice in classical information theory. This remarkable feature, the superadditive quantum coding gain, can be implemented by appropriate choices of code words and corresponding quantum decoding which requires a collective quantum measurement. Recently, the first experimental demonstration was reported [Phys. Rev. Lett. 90, 167906 (2003)]. The purpose of this paper is to describe our experiment in detail. Particularly, a design strategy of quantum collective decoding in physical quantum circuits is emphasized. We also address the practical implication of the gain on communication performance by introducing the quantum-classical hybrid coding scheme. We show how the superadditive quantum coding gain, even in a small code length, can boost the communication performance of conventional coding technique.
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"abstract": "Quantum information theory predicts that when the transmission resource is\ndoubled in quantum channels, the amount of information transmitted can be\nincreased more than twice by quantum channel coding technique, whereas the\nincrease is at most twice in classical information theory. This remarkable\nfeature, the superadditive quantum coding gain, can be implemented by\nappropriate choices of code words and corresponding quantum decoding which\nrequires a collective quantum measurement. Recently, the first experimental\ndemonstration was reported [Phys. Rev. Lett. 90, 167906 (2003)]. The purpose of\nthis paper is to describe our experiment in detail. Particularly, a design\nstrategy of quantum collective decoding in physical quantum circuits is\nemphasized. We also address the practical implication of the gain on\ncommunication performance by introducing the quantum-classical hybrid coding\nscheme. We show how the superadditive quantum coding gain, even in a small code\nlength, can boost the communication performance of conventional coding\ntechnique.",
"arxiv_id": "quant-ph/0306034",
"authors": [
"M. Takeoka",
"M. Fujiwara",
"J. Mizuno",
"M. Sasaki"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.69.052329",
"journal_ref": "Phys. Rev. A 69, 052329 (2004)",
"title": "Implementation of generalized quantum measurements: superadditive quantum coding, accessible information extraction, and classical capacity limit",
"url": "https://arxiv.org/abs/quant-ph/0306034"
},
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