Security of quantum key distribution with discrete rotational symmetry
| dc.creator | Koashi, Masato | |
| dc.date | 2005-07-16 | |
| dc.date.accessioned | 2026-07-07T06:13:12Z | |
| dc.date.available | 2026-07-07T06:13:12Z | |
| dc.description | 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 $η$, we show that the key rate in SARG04 scales as $O(η^{3/2})$. When we increase the number of states to M=2k-1 or 2k, the key rate scaling improves as $O(η^{(k+1)/k})$. | |
| dc.description | 4 pages, 1 figure | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0507154 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0507154 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/93023 | |
| dc.subject | Quantum Physics | |
| dc.title | Security of quantum key distribution with discrete rotational symmetry | |
| dc.type | text |