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Title: Investigation and application of diamond colour centres as hybrid quantum information platforms
Author: Kennard, Jake
ISNI:       0000 0004 5924 2143
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2014
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Diamond colour centres represent promising systems for quantum information processing, with applications in quantum computation, quantum simulation and quantum metrology. Moreover, since they have both optical spectra and spin degrees of freedom they are strong candidates for hybrid spin- photon qubit platforms. In this thesis we present results from two major diamond colour centres; the NV-centre and the chromium related centre. We discuss in detail the optical properties of these centres and their applicability as single photons and the challenges that still remain. We experimentally demonstrate coherent manipulation of single photons from a chromium related centre in an integrated optical waveguide circuit and use this to verify the wave- particle duality of the photons. The second half of the thesis concentrates on the use of the NV- centre as a spin qubit. We describe in detail the manipulation of the spin ground state of the NV- centre as a spin qubit before investigating the spin environment of the NV- centre and its effect on the coherence of the centre. Finally we introduce a theoretical quantum metrology scheme for a hybrid spin- photon system and note that this method can achieve the maximum Heisenberg scaling of sensitivity in the presence of loss. We discuss the remaining theoretical challenges to be overcome for this system and its applicability to real systems.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available