Towards Real-World Adoption of Quantum Key Distribution using Entangled Photons

[摘要] In order for quantum key distribution (QKD) to move from the lab to widespread adoption,it will need to be compatible with existing infrastructure. To that end, I demonstratean implementation of QKD with entangled photons on active, standard telecommunications ber. By using a wavelength outside of the conventional band used by telecommunicationstra c, I achieve minimal disruption to either the quantum or classical signals. In an attemptto extend the reach of QKD with entangled photons I studied the parameters ofthese systems. I developed a model for the number of measured two-fold coincidences thatmaximizes the secure key rate (SKR), for any combination of system parameters, usinga symbolic regression algorithm based on simulated data. I validated this model againstexperimental data, and demonstrated its usefulness by applying it to simulations of QKDbetween the ground and a satellite and in opticalbers. Finally, I worked on a step towardsa new entangled photon source that is a hybrid between visible and telecommunicationswavelengths by building a hybrid single photon source.

[发布机构] University of Waterloo

[效力级别] Quantum Information

[关键词] Quantum Key Distribution;Quantum Information;Physics