RESUMO
A high speed physical random bit generator is applied for the first time to a gigahertz clocked quantum key distribution system. Random phase-modulation in a differential-phase-shift quantum key distribution (DPS-QKD) system is performed using a 1-Gbps random bit signal which is generated by a physical random bit generator with chaotic semiconductor lasers. Stable operation is demonstrated for over one hour, and sifted keys are successfully generated at a rate of 9.0 kbps with a quantum bit error rate of 3.2% after 25-km fiber transmission.
Assuntos
Redes de Comunicação de Computadores/instrumentação , Segurança Computacional/instrumentação , Lasers Semicondutores , Processamento de Sinais Assistido por Computador/instrumentação , Telecomunicações/instrumentação , Desenho Assistido por Computador , Desenho de Equipamento , Análise de Falha de Equipamento , Reprodutibilidade dos Testes , Sensibilidade e EspecificidadeRESUMO
We experimentally observe fractal patterns of chaotic light scattering in regular polyhedral mirror ball structures that consist of spherical reflectors located at the vertices of polyhedra as optical scattering devices. We measure the fractal dimension of the basin boundaries of the light scattering patterns in the regular polyhedral mirror ball structures.
