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Approaching the Integration of Quantum Optical Network Layers
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Dissertation
Approaching the Integration of Quantum Optical Network Layers
2016
Overview
Known quantum optical network implementations, mostly specific to Quantum Key Distribution (QKD), rely on fixed point-to-point connections—a topology proven to be non-scalable with increasing numbers of endpoints and starkly at odds with contemporary mesh networks. Although encoded onto the delicate states of individual photons, quantum information should ideally leverage existing fiber-optical infrastructure, and therefore observe a degree of integration with the layers in the classical domain. Given the remaining ambiguities of quantum communication technologies, compatibility is far from assured. This thesis discusses the factors that limit and enable the exchange of quantum information at each characteristic layer of an optical network. The key contributions of this thesis include: (1) a strategy for achieving dynamic routing and forwarding agnostic to encoding of photonic qubits; (2) a finding that quantum repeater schemes will fail to provide dynamic scalability due to limitations of entanglement distribution; (3) a justification for why classical encapsulation will be remain crucial for quantum switching/routing and the advantage of using encapsulation in tandem with channel separation; and (4) an assessment of the minimum spectrum provisioning over fiber links to support concurrent quantum & classical optical data.
