dorsal/arxiv
View SchemaSecurity of quantum key distribution with discrete rotational symmetry
| Authors | Masato Koashi |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0507154 |
| URL | https://arxiv.org/abs/quant-ph/0507154 |
Abstract
We prove the unconditional security of quantum key distribution protocols using attenuated laser pulses with M different linear polarizations. When M=4, the proof covers the so-called SARG04 protocol [V.~Scarani et al., Phys. Rev.\ Lett. {\bf 92}, 057901 (2004)], which uses exactly the same quantum communication as the Bennett-Brassard 1984 protocol. For a channel with transmission $\eta$, we show that the key rate in SARG04 scales as $O(\eta^{3/2})$. When we increase the number of states to M=2k-1 or 2k, the key rate scaling improves as $O(\eta^{(k+1)/k})$.
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"date_modified": "2026-03-02T18:02:20.536000Z",
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"abstract": "We prove the unconditional security of quantum key distribution protocols\nusing attenuated laser pulses with M different linear polarizations. When M=4,\nthe proof covers the so-called SARG04 protocol [V.~Scarani et al., Phys. Rev.\\\nLett. {\\bf 92}, 057901 (2004)], which uses exactly the same quantum\ncommunication as the Bennett-Brassard 1984 protocol. For a channel with\ntransmission $\\eta$, we show that the key rate in SARG04 scales as\n$O(\\eta^{3/2})$. When we increase the number of states to M=2k-1 or 2k, the key\nrate scaling improves as $O(\\eta^{(k+1)/k})$.",
"arxiv_id": "quant-ph/0507154",
"authors": [
"Masato Koashi"
],
"categories": [
"quant-ph"
],
"title": "Security of quantum key distribution with discrete rotational symmetry",
"url": "https://arxiv.org/abs/quant-ph/0507154"
},
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