2010/04/01 by R. J. Collins, Robert J. Collins, Patrick J. Clarke +13
Computer Science · Engineering · Physics and Astronomy · #Optical fiber #Optics #Optoelectronics #Photon #Photonic and Optical Devices #Physics #Quantum #Quantum Information and Cryptography #Quantum cryptography #Quantum dot #Quantum entanglement #Quantum information #Quantum information science #Quantum key distribution #Quantum mechanics #Quantum network #Quantum optics #Quantum optics and atomic interactions #Single-photon source #quant-ph
paper · pdf · doi:10.1063/1.3327427
published as Journal of Applied Physics, Volume 107, Number 7, Article Number 073102 (2010) · Final manuscript version, some grammatical differences from the published version. 26 pages including 7 figures.
openalex publication_date 2010/04/01 · arxiv created 2010/04/27 · arxiv updated 2010/04/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A demonstration of the principles of quantum key distribution (QKD) is performed using a single-photon source in a proof of concept test-bed over a distance of 2 km in standard telecommunications optical fiber. The single-photon source was an optically-pumped quantum dot in a microcavity emitting at a wavelength of 895 nm. Characterization of the QKD parameters was performed at a range of different optical excitation powers. An investigation of the effect of varying the optical excitation power of the quantum dot microcavity on the quantum bit error rate and cryptographic key exchange rate of the system are presented.