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

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 demonstrate
an implementation of QKD with entangled photons on active, standard telecommunications
ber. By using a wavelength outside of the conventional band used by telecommunications
tra c, I achieve minimal disruption to either the quantum or classical signals. In an attempt
to extend the reach of QKD with entangled photons I studied the parameters of
these systems. I developed a model for the number of measured two-fold coincidences that
maximizes the secure key rate (SKR), for any combination of system parameters, using
a symbolic regression algorithm based on simulated data. I validated this model against
experimental data, and demonstrated its usefulness by applying it to simulations of QKD
between the ground and a satellite and in optical bers. Finally, I worked on a step towards
a new entangled photon source that is a hybrid between visible and telecommunications
wavelengths by building a hybrid single photon source.

Identiferoai:union.ndltd.org:WATERLOO/oai:uwspace.uwaterloo.ca:10012/6865
Date01 August 2012
CreatorsHolloway, Catherine
Source SetsUniversity of Waterloo Electronic Theses Repository
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation

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