Study of realistic devices for quantum key-distribution

Quantum optics;Quantum key distribution;Realistic devices;Imperfect devices;Physics

Narasimhachar, Varun

University of Waterloo

关键词: Quantum optics;    Quantum key distribution;    Realistic devices;    Imperfect devices;    Physics;   

Others  :  https://uwspace.uwaterloo.ca/bitstream/10012/6348/1/Narasimhachar_Varun.pdf

瑞士|英语

来源: UWSPACE Waterloo Institutional Repository

【 摘 要 】

Quantum key-distribution (QKD) is a scheme for establishing shared secret key between remote parties. In such a scheme, quantum preparation and measurement devices (sources and detectors) are used. In existing theoretical treatments of QKD, the device models used do not capture all the imperfections which might occur in realistic devices. This creates a gap between the practical implementations and theoretical descriptions of QKD. In the present work, we contribute in bridging this gap by three methods: 1) Advancing the study of squashing models of measurement devices, 2) Devising an alternative to squashing models using statistical estimation in optical QKD, and 3) Modifying the security proof formalism of QKD to account for imperfect devices.