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High-fidelity quantum logic in Ca+

Author: Christopher J Ballance
Publisher: Cham, Switzerland : Springer, 2017.
Series: Springer theses.
Edition/Format:   eBook : Document : EnglishView all editions and formats
Summary:
This thesis describes experimental work in the field of trapped-ion quantum computation. It outlines the theory of Raman interactions, examines the various sources of error in two-qubit gates, and describes in detail experimental explorations of the sources of infidelity in implementations of single- and two-qubit gates. Lastly, it presents an experimental demonstration of a mixed-species entangling gate.
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Genre/Form: Electronic book
Electronic books
Additional Physical Format: Printed edition:
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Christopher J Ballance
ISBN: 9783319682167 3319682164 3319682156 9783319682150
OCLC Number: 1006502710
Notes: "Doctoral thesis accepted by the University of Oxford, Oxford, UK."
Description: 1 online resource
Contents: ""Supervisorâ#x80;#x99;s Foreword""; ""Abstract""; ""Acknowledgements""; ""Contents""; ""1 Introduction""; ""1.1 The Quantum Computer""; ""1.2 Quantum Computation with Trapped Ions""; ""1.3 Thesis Outline""; ""References""; ""2 Trapped-Ion Qubits""; ""2.1 The Calcium Ion as a Qubit""; ""2.1.1 Photo-Ionisation""; ""2.1.2 Doppler Cooling""; ""2.1.3 The Qubit and Coherent Manipulations""; ""2.1.4 Readout of the Qubit State""; ""2.2 Linear Paul Traps""; ""2.2.1 Micro-Motion Detection and Compensation""; ""2.3 Motion of the Ions""; ""2.3.1 Quantization of Motion""; ""2.3.2 Coupling to the Motion"" ""4.2 The Geometric Phase Gate""""4.3 The Light-Shift Gate""; ""4.4 Sources of Error""; ""4.4.1 Mis-Set Gate Detuning""; ""4.4.2 Mis-Set Rabi Frequency""; ""4.4.3 Unequal Illumination""; ""4.4.4 Thermal Errors""; ""4.4.5 Motional Heating""; ""4.4.6 Motional Dephasing""; ""4.4.7 Amplitude and Phase Noise""; ""4.4.8 Motional Kerr Cross-Coupling""; ""4.4.9 Spin Dephasing from Rayleigh Scattering""; ""4.4.10 Raman Photon Scattering""; ""4.4.11 Off-Resonant Excitation""; ""4.5 Error Summary""; ""References""; ""5 Apparatus""; ""5.1 The Ion Trap""; ""5.1.1 Trap Geometry""; ""5.1.2 Vacuum System"" ""5.1.3 Trap RF Source""""5.1.4 Trap DC Source""; ""5.2 Magnetic Field Coils""; ""5.3 Imaging System""; ""5.4 Laser Systems""; ""5.4.1 Ca+ Lasers""; ""5.4.2 Photo-Ionisation Lasers""; ""5.4.3 Beam-Paths""; ""5.5 Raman Lasers""; ""5.5.1 Laser Sources""; ""5.5.2 AOM Switch-Yard and Optical Fibres""; ""5.5.3 Beam-Paths""; ""5.6 Microwave Qubit Drive""; ""5.7 Experimental Control""; ""5.7.1 Coherent DDS""; ""5.7.2 Laser Intensity Stabilisation""; ""References""; ""6 Experiment Characterization""; ""6.1 Trap Behaviour""; ""6.1.1 Axial Micro-Motion""; ""6.1.2 Magnetic Field Gradient"" ""6.1.3 Recrystallisation""""6.2 State-Preparation and Readout""; ""6.2.1 43Ca+ Optical Qubit""; ""6.2.2 43Ca+ Stretch Qubit""; ""6.2.3 43Ca+ Low-Field Clock Qubit""; ""6.2.4 40Ca+ Zeeman Qubit""; ""6.3 Qubit Dephasing and Frequency Drift""; ""6.3.1 Magnetic Field Drift and Modulation""; ""6.3.2 Stretch Qubit Coherence""; ""6.3.3 Clock Qubit Coherence""; ""6.4 Raman Lasers""; ""6.4.1 Beam-Pointing and Rabi Frequency Stability""; ""6.4.2 Intensity and Phase Noise""; ""6.5 Motion""; ""6.5.1 Cooling""; ""6.5.2 Motional Frequency Drifts""; ""6.5.3 Motional Heating""; ""6.5.4 Motional Coherence""
Series Title: Springer theses.
Responsibility: Christopher J. Ballance.

Abstract:

This thesis describes experimental work in the field of trapped-ion quantum computation. It outlines the theory of Raman interactions, examines the various sources of error in two-qubit gates, and  Read more...

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