dorsal/arxiv
View SchemaNo-Switching Quantum Key Distribution using Broadband Modulated Coherent Light
| Authors | Andrew M. Lance, Thomas Symul, Vikram Sharma, Christian Weedbrook, Timothy C. Ralph, Ping Koy Lam |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0504004 |
| URL | https://arxiv.org/abs/quant-ph/0504004 |
| DOI | 10.1103/PhysRevLett.95.180503 |
| Journal | Phys. Rev. Lett. 95, 180503 (2005) |
Abstract
We realize an end-to-end no-switching quantum key distribution protocol using continuous-wave coherent light. We encode weak broadband Gaussian modulations onto the amplitude and phase quadratures of light beams at the Shannon's information limit. Our no-switching protocol achieves high secret key rate via a post-selection protocol that utilizes both quadrature information simultaneously. We establish a secret key rate of 25 Mbits/s for a lossless channel and 1 kbit/s, per 17 MHz of detected bandwidth, for 90% channel loss. Since our scheme is truly broadband, it can potentially deliver orders of magnitude higher key rates by extending the encoding bandwidth with higher-end telecommunication technology.
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"abstract": "We realize an end-to-end no-switching quantum key distribution protocol using\ncontinuous-wave coherent light. We encode weak broadband Gaussian modulations\nonto the amplitude and phase quadratures of light beams at the Shannon\u0027s\ninformation limit. Our no-switching protocol achieves high secret key rate via\na post-selection protocol that utilizes both quadrature information\nsimultaneously. We establish a secret key rate of 25 Mbits/s for a lossless\nchannel and 1 kbit/s, per 17 MHz of detected bandwidth, for 90% channel loss.\nSince our scheme is truly broadband, it can potentially deliver orders of\nmagnitude higher key rates by extending the encoding bandwidth with higher-end\ntelecommunication technology.",
"arxiv_id": "quant-ph/0504004",
"authors": [
"Andrew M. Lance",
"Thomas Symul",
"Vikram Sharma",
"Christian Weedbrook",
"Timothy C. Ralph",
"Ping Koy Lam"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.95.180503",
"journal_ref": "Phys. Rev. Lett. 95, 180503 (2005)",
"title": "No-Switching Quantum Key Distribution using Broadband Modulated Coherent Light",
"url": "https://arxiv.org/abs/quant-ph/0504004"
},
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