dorsal/arxiv
View SchemaExceeding classical capacity limit in quantum optical channel
| Authors | Mikio Fujiwara, Masahiro Takeoka, Jun Mizuno, Masahide Sasaki |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0304037 |
| URL | https://arxiv.org/abs/quant-ph/0304037 |
| DOI | 10.1103/PhysRevLett.90.167906 |
| Journal | Phys. Rev. Lett. 90, 167906 (2003). |
Abstract
The amount of information transmissible through a communications channel is determined by the noise characteristics of the channel and by the quantities of available transmission resources. In classical information theory, the amount of transmissible information can be increased twice at most when the transmission resource (e.g. the code length, the bandwidth, the signal power) is doubled for fixed noise characteristics. In quantum information theory, however, the amount of information transmitted can increase even more than twice. We present a proof-of-principle demonstration of this super-additivity of classical capacity of a quantum channel by using the ternary symmetric states of a single photon, and by event selection from a weak coherent light source. We also show how the super-additive coding gain, even in a small code length, can boost the communication performance of conventional coding technique.
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"abstract": "The amount of information transmissible through a communications channel is\ndetermined by the noise characteristics of the channel and by the quantities of\navailable transmission resources. In classical information theory, the amount\nof transmissible information can be increased twice at most when the\ntransmission resource (e.g. the code length, the bandwidth, the signal power)\nis doubled for fixed noise characteristics. In quantum information theory,\nhowever, the amount of information transmitted can increase even more than\ntwice. We present a proof-of-principle demonstration of this super-additivity\nof classical capacity of a quantum channel by using the ternary symmetric\nstates of a single photon, and by event selection from a weak coherent light\nsource. We also show how the super-additive coding gain, even in a small code\nlength, can boost the communication performance of conventional coding\ntechnique.",
"arxiv_id": "quant-ph/0304037",
"authors": [
"Mikio Fujiwara",
"Masahiro Takeoka",
"Jun Mizuno",
"Masahide Sasaki"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.90.167906",
"journal_ref": "Phys. Rev. Lett. 90, 167906 (2003).",
"title": "Exceeding classical capacity limit in quantum optical channel",
"url": "https://arxiv.org/abs/quant-ph/0304037"
},
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