dorsal/arxiv
View SchemaExperimental Quantum Key Distribution with Decoy States
| Authors | Yi Zhao, Bing Qi, Xiongfeng Ma, Hoi-Kwong Lo, Li Qian |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0503192 |
| URL | https://arxiv.org/abs/quant-ph/0503192 |
| DOI | 10.1103/PhysRevLett.96.070502 |
| Journal | Physical Review Letters 96, 070502 (2006). |
Abstract
To increase dramatically the distance and the secure key generation rate of quantum key distribution (QKD), the idea of quantum decoys--signals of different intensities--has recently been proposed. Here, we present the first experimental implementation of decoy state QKD. By making simple modifications to a commercial quantum key distribution system, we show that a secure key generation rate of 165bit/s, which is 1/4 of the theoretical limit, can be obtained over 15km of a Telecom fiber. We also show that with the same experimental parameters, not even a single bit of secure key can be extracted with a non-decoy-state protocol. Compared to building single photon sources, decoy state QKD is a much simpler method for increasing the distance and key generation rate of unconditionally secure QKD.
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"abstract": "To increase dramatically the distance and the secure key generation rate of\nquantum key distribution (QKD), the idea of quantum decoys--signals of\ndifferent intensities--has recently been proposed. Here, we present the first\nexperimental implementation of decoy state QKD. By making simple modifications\nto a commercial quantum key distribution system, we show that a secure key\ngeneration rate of 165bit/s, which is 1/4 of the theoretical limit, can be\nobtained over 15km of a Telecom fiber. We also show that with the same\nexperimental parameters, not even a single bit of secure key can be extracted\nwith a non-decoy-state protocol. Compared to building single photon sources,\ndecoy state QKD is a much simpler method for increasing the distance and key\ngeneration rate of unconditionally secure QKD.",
"arxiv_id": "quant-ph/0503192",
"authors": [
"Yi Zhao",
"Bing Qi",
"Xiongfeng Ma",
"Hoi-Kwong Lo",
"Li Qian"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.96.070502",
"journal_ref": "Physical Review Letters 96, 070502 (2006).",
"title": "Experimental Quantum Key Distribution with Decoy States",
"url": "https://arxiv.org/abs/quant-ph/0503192"
},
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