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Progress towards arrays of qubits using diamond
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Stephen, Colin J. (2019) Progress towards arrays of qubits using diamond. PhD thesis, University of Warwick.
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WRAP_Theses_Stephen_2019.pdf - Submitted Version - Requires a PDF viewer. Download (26Mb) | Preview |
Official URL: http://webcat.warwick.ac.uk/record=b3711246
Abstract
The nitrogen vacancy centre (NV{ ) in diamond has promising properties for several applications in quantum computing and sensing. The works described in this thesis each contribute towards our ability to build systems using NV{ . One such aspiration is the capability to build scalable arrays of deterministically placed, high quality qubits which can be accessed optically. NV{ is a potential candidate however the best current method for entangling two NV{ centres requires that each one is in a separate cryostat which is not scalable. This work shows that single NV{ centres can be laser-written in arrays 6-30 µm deep inside of a diamond with spin coherence times that are an order of magnitude longer than previous laser-written NV{ centres and at least as long as naturally-occurring NV{ . This depth is suitable for integration with solid immersion lenses or optical cavities. Depth-dependent T2 measurements reveal which depths avoid surface-induced decoherence. Tens of thousands of these NV{ could be written into one diamond plate. Additionally a _bre coupled, cryogenic, uorescence confocal microscope has been developed to evaluate the possibilities for using scattered nanodiamonds for sensing at low temperatures.
Item Type: | Thesis (PhD) | ||||
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Subjects: | Q Science > QC Physics | ||||
Library of Congress Subject Headings (LCSH): | Nanophotonics, Diamonds, Nanodiamonds, Quantum computing, Annealing of crystals | ||||
Official Date: | July 2019 | ||||
Dates: |
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Institution: | University of Warwick | ||||
Theses Department: | Department of Physics | ||||
Thesis Type: | PhD | ||||
Publication Status: | Unpublished | ||||
Supervisor(s)/Advisor: | Morley, Gavin | ||||
Format of File: | |||||
Extent: | xvii, 188 leaves : illustrations | ||||
Language: | eng |
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