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Hyperpolarisation of external nuclear spins using nitrogen-vacancy centre ensembles
A. J. Healey, L. T. Hall, G. A. L. White +5
The nitrogen-vacancy (NV) centre in diamond has emerged as a candidate to non-invasively hyperpolarise nuclear spins in molecular systems to improve the sensitivity of nuclear magn…
Prospects for nuclear spin hyperpolarisation of molecular samples using nitrogen-vacancy centres in diamond
J. -P. Tetienne, L. T. Hall, A. J. Healey +4
After initial proof-of-principle demonstrations, optically pumped nitrogen-vacancy (NV) centres in diamond have been proposed as a non-invasive platform to achieve hyperpolarisatio…
Imaging domain reversal in an ultrathin van der Waals ferromagnet
David A. Broadway, Sam C. Scholten, Cheng Tan +12
The recent isolation of two-dimensional van der Waals magnetic materials has uncovered rich physics that often differs from the magnetic behaviour of their bulk counterparts. Howev…
Imaging graphene field-effect transistors on diamond using nitrogen-vacancy microscopy
Scott E. Lillie, Nikolai Dontschuk, David A. Broadway +3
The application of imaging techniques based on ensembles of nitrogen-vacancy (NV) sensors in diamond to characterise electrical devices has been proposed, but the compatibility of…
Atomic-level Characterisation of Quantum Computer Arrays by Machine Learning
Muhammad Usman, Yi Z. Wong, Charles D. Hill +1
Atomic level qubits in silicon are attractive candidates for large-scale quantum computing, however, their quantum properties and controllability are sensitive to details such as t…
Apparent delocalisation of the current flow in metallic wires observed with diamond nitrogen-vacancy magnetometry
J. -P. Tetienne, N. Dontschuk, D. A. Broadway +5
We report on a quantitative analysis of the magnetic field generated by a continuous current running in metallic micro-wires fabricated on an electrically insulating diamond substr…
Magnetic noise from ultra-thin abrasively deposited materials on diamond
S. E. Lillie, D. A. Broadway, N. Dontschuk +6
Sensing techniques based on the negatively charged nitrogen-vacancy (NV) centre in diamond have emerged as promising candidates to characterise ultra-thin and 2D materials. An outs…
Two-Electron Spin Correlations in Precision Placed Donors in Silicon
M. A. Broome, S. K. Gorman, M. G. House +8
Substitutional donor atoms in silicon are promising qubits for quantum computation with extremely long relaxation and dephasing times demonstrated. One of the critical challenges o…
Evidence for Primal sp2 Defects at the Diamond Surface: Candidates for Electron Trapping and Noise Sources
Alastair Stacey, Nikolai Dontschuk, Jyh-Pin Chou +11
Diamond materials are central to an increasing range of advanced technological demonstrations, from high power electronics, to nano-scale quantum bio-imaging with unprecedented sen…
Proximity-induced artefacts in magnetic imaging with nitrogen-vacancy ensembles in diamond
J. -P. Tetienne, D. A. Broadway, S. E. Lillie +6
Magnetic imaging with ensembles of nitrogen-vacancy (NV) centres in diamond is a recently developed technique that allows for quantitative vector field mapping. Here we uncover a s…
Valley filtering and spatial maps of coupling between silicon donors and quantum dots
J. Salfi, B. Voisin, A. Tankasala +6
Exchange coupling is a key ingredient for spin-based quantum technologies since it can be used to entangle spin qubits and create logical spin qubits. However, the influence of the…
Environmentally mediated coherent control of a spin qubit in diamond
Scott E. Lillie, David A. Broadway, James D. A. Wood +4
The coherent control of spin qubits forms the basis of many applications in quantum information processing and nanoscale sensing, imaging and spectroscopy. Such control is conventi…
Microwave-Free Nuclear Magnetic Resonance at Molecular Scales
James D. A. Wood, Jean-Philippe Tetienne, David A. Broadway +4
The implementation of nuclear magnetic resonance (NMR) at the nanoscale is a major challenge, as conventional systems require relatively large ensembles of spins and limit resoluti…
Quantum imaging of current flow in graphene
Jean-Philippe Tetienne, Nikolai Dontschuk, David A. Broadway +3
Since its first isolation in 2004, graphene has been found to host a plethora of unusual electronic transport phenomena, making it a fascinating system for fundamental studies in c…
Spin dynamics of diamond nitrogen-vacancy centres at the ground state level anti-crossing and all-optical low frequency magnetic field sensing
David A. Broadway, James D. A. Wood, Liam T. Hall +5
We investigate the photo-induced spin dynamics of single nitrogen-vacancy (NV) centres in diamond near the electronic ground state level anti-crossing (GSLAC), which occurs at an a…
Superadiabatic quantum state transfer in spin chains
Ricardo Agundez, Charles D. Hill, Lloyd C. L. Hollenberg +2
In this letter we propose a superadiabatic protocol where quantum state transfer can be achieved with arbitrarily high accuracy and minimal control across long spin chains with an…
Scanning nano-spin ensemble microscope for nanoscale magnetic and thermal imaging
Jean-Philippe Tetienne, Alain Lombard, David A. Simpson +4
Quantum sensors based on solid-state spins provide tremendous opportunities in a wide range of fields from basic physics and chemistry to biomedical imaging. However, integrating t…
Magneto-optical imaging of thin magnetic films using spins in diamond
David A. Simpson, Jean-Philippe Tetienne, Julia McCoey +5
Imaging the fields of magnetic materials provides crucial insight into the physical and chemical processes surrounding magnetism, and has been a key ingredient in the spectacular d…
Analytic solutions to the central spin problem for Nitrogen Vacancy centres in diamond
Liam T. Hall, Jared H. Cole, Lloyd C. L. Hollenberg
Due to interest in both solid state based quantum computing architectures and the application of quantum mechanical systems to nanomagnetometry, there has been considerable recent…
Magnetic spin imaging under ambient conditions with sub-cellular resolution
S. Steinert, F. Ziem, L. Hall +6
Measuring spins is the corner stone of a variety of analytical techniques including modern magnetic resonance imaging (MRI). The full potential of spin imaging and sensing across l…
Sensing of Fluctuating Nanoscale Magnetic Fields Using NV Centres in Diamond
Liam T. Hall, Charles D. Hill, Jared H. Cole +1
New magnetometry techniques based on Nitrogen-Vacancy (NV) defects in diamond allow for the imaging of static (DC) and oscillatory (AC) nanoscopic magnetic systems. However, these…
Architecture for high-sensitivity single-shot readout and control of the electron spin of individual donors in silicon
A. Morello, C. C. Escott, H. Huebl +5
We describe a method to control and detect in single-shot the electron spin state of an individual donor in silicon with greatly enhanced sensitivity. A silicon-based Single-Electr…
Spatial adiabatic passage in a realistic triple well structure
Jared H. Cole, Andrew D. Greentree, L. C. L. Hollenberg +1
We investigate the evolution of an electron undergoing coherent tunneling via adiabatic passage (CTAP) using the solution of the one-dimensional Schroedinger equation in both space…
An electrostatically defined serial triple quantum dot charged with few electrons
D. Schröer, A. D. Greentree, L. Gaudreau +4
A serial triple quantum dot (TQD) electrostatically defined in a GaAs/AlGaAs heterostructure is characterized by using a nearby quantum point contact as charge detector. Ground sta…