|
| related topics |
| {key, protocol, security} |
| {photon, photons, single} |
| {state, phys, rev} |
| {light, field, probe} |
| {alice, bob, state} |
| {spin, pulse, spins} |
| {state, algorithm, problem} |
| {force, casimir, field} |
|
Experimental Quantum Key Distribution with Decoy States
Yi Zhao, Bing Qi, Xiongfeng Ma, Hoi-Kwong Lo, Li Qian
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.
- oai_identifier:
- oai:arXiv.org:quant-ph/0503192
- categories:
- quant-ph
- comments:
- Revised Version, 4 pages, one figures, two-column format
- doi:
- 10.1103/PhysRevLett.96.070502
- arxiv_id:
- quant-ph/0503192
- journal_ref:
- Physical Review Letters 96, 070502 (2006).
- created:
- 2005-03-23
- updated:
- 2005-11-03
Full article ▸
|
|
| related documents |
| 0505108v1 |
| 0310168v2 |
| 9911043v5 |
| 0107130v1 |
| 0410215v2 |
| 0111073v2 |
| 0503002v1 |
| 9810067v3 |
| 0211153v5 |
| 0403036v5 |
| 0409099v2 |
| 0703099v5 |
| 0205060v3 |
| 0403133v2 |
| 0304035v1 |
| 0611145v1 |
| 0603234v1 |
| 0503157v1 |
| 0511163v2 |
| 0509211v1 |
| 0610096v2 |
| 0504150v2 |
| 0009113v1 |
| 9703035v1 |
| 0612052v2 |
|