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dc.contributor.advisorPryde, Geoff
dc.contributor.authorWeston, Margan Marianna Mackenzie
dc.date.accessioned2018-01-23T02:53:55Z
dc.date.available2018-01-23T02:53:55Z
dc.date.issued2017
dc.identifier.doi10.25904/1912/1544
dc.identifier.urihttp://hdl.handle.net/10072/367516
dc.description.abstractQuantum optics promises excellent capabilities for experimental demonstrations of quantum information processing. So far, the practical implementation of protocols displaying a clear quantum advantage has been limited, as they rely on perfect quantum states and high delity measurements. Additionally, the fragile nature of the quantum states makes them susceptible to imperfections in measurement devices, and environmental loss. Two of the key challenges for quantum technologies are that of producing single photons, and pairs of entangled photons, more eciently, and overcoming the detrimental effects of photon loss. The research presented in this thesis tackles the practical realisation of quantum-enhanced protocols by improving spontaneous parametric down conversion for producing photon pairs. I present a spontaneous parametric down-conversion source of frequency-uncorrelated polarisation-entangled photon pairs at telecom wavelengths. The source provides photon pairs that display-simultaneously-the key properties for high-performance quantum information tasks and the investigation of fundamental quantum physics. Specifically, the source provides high heralding efficiency, high quantum state purity and high entangled-state fidelity at the same time. Among the different tests applied, perfect non-classical interference between photons from independent sources with a visibility of (1005)% was observed. Additionally, the polarisation-unentangled version of the source achieved symmetric heralding efficiencies of up to (82 2)%. The following two experiments presented in this thesis make use of these high-performance sources to implement an entanglement verication protocol over a high-loss quantum channel, and to perform a quantum metrology experiment, both of which were not previously achievable with existing sources or designs.
dc.languageEnglish
dc.publisherGriffith University
dc.publisher.placeBrisbane
dc.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
dc.subject.keywordsQuantum optics
dc.subject.keywordsQuantum information processing
dc.subject.keywordsPhoton pairs
dc.subject.keywordsHigh-performance quantum information tasks
dc.titleExperimental Optical Quantum Science: Efficient Multi-Photon Sources for Quantum Information Science
dc.typeGriffith thesis
dc.date.embargoEnd2018-05-19
gro.facultyScience, Environment, Engineering and Technology
gro.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
gro.hasfulltextFull Text
dc.contributor.otheradvisorSang, Robert
gro.identifier.gurtIDgu1505182855985
gro.source.ADTshelfnoADT0
gro.source.GURTshelfnoGURT
gro.thesis.degreelevelThesis (PhD Doctorate)
gro.thesis.degreeprogramDoctor of Philosophy (PhD)
gro.departmentSchool of Natural Sciences
gro.griffith.authorWeston, Morgan M.


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