Zobrazeno 1 - 10
of 210
pro vyhledávání: '"Morley, G W"'
Autor:
Graham, S. M., Newman, A. J., Stephen, C. J., Edmonds, A. M., Twitchen, D. J., Markham, M. L., Morley, G. W.
Nitrogen vacancy centres in diamond can be used for vector magnetometry. In this work we present a portable vector diamond magnetometer. Its vector capability, combined with feedback control and robust structure enables operation on moving platforms.
Externí odkaz:
http://arxiv.org/abs/2401.16090
Publikováno v:
Physical Review Applied 21, 014003 (2024)
Vector magnetometry provides more information than scalar measurements for magnetic surveys utilized in space, defense, medical, geological and industrial applications. These areas would benefit from a mobile vector magnetometer that can operate in e
Externí odkaz:
http://arxiv.org/abs/2307.05438
Autor:
Graham, S. M., Rahman, A. T. M. A., Munn, L., Patel, R. L., Newman, A. J., Stephen, C. J., Colston, G., Nikitin, A., Edmonds, A. M., Twitchen, D. J., Markham, M. L., Morley, G. W.
Publikováno v:
Physical Review Applied 19, 044042 (2023)
Ensembles of nitrogen vacancy centres (NVCs) in diamond can be employed for sensitive magnetometry. In this work we present a fiber-coupled NVC magnetometer with an unshielded sensitivity of (30 $\pm$ 10) pT/$\sqrt{\textrm{Hz}}$ in a (10 - 500)-Hz fr
Externí odkaz:
http://arxiv.org/abs/2211.09170
Autor:
Wood, B. D., Stimpson, G. A., March, J. E., Lekhai, Y. N. D., Stephen, C. J., Green, B. L., Frangeskou, A. C., Ginés, L., Mandal, S., Williams, O. A., Morley, G. W.
Publikováno v:
Physical Review B 105, 205401 (2022)
Nanodiamonds containing negatively charged nitrogen vacancy centres (${\text{NV}}^{-}$) have applications as localized sensors in biological material and have been proposed as a platform to probe the macroscopic limits of spatial superposition and th
Externí odkaz:
http://arxiv.org/abs/2112.01899
Publikováno v:
Physical Review A 105, 012824 (2022)
Levitated nanodiamonds containing negatively charged nitrogen-vacancy centers (${\text{NV}}^{-}$) have been proposed as a platform to generate macroscopic spatial superpositions. Requirements for this include having a long ${\text{NV}}^{-}$ spin cohe
Externí odkaz:
http://arxiv.org/abs/2105.02105
Autor:
Zhou, L. Q., Patel, R. L., Frangeskou, A. C., Nikitin, A., Green, B. L., Breeze, B. G., Onoda, S., Isoya, J., Morley, G. W.
Publikováno v:
Phys. Rev. Applied 15, 024015 (2021)
We demonstrate a simple, robust and contactless method for non-destructive testing of magnetic materials such as steel. This uses a fiber-coupled magnetic sensor based on nitrogen vacancy centers (NVC) in diamond without magnetic shielding. Previous
Externí odkaz:
http://arxiv.org/abs/2011.02459
Autor:
Patel, R. L., Zhou, L. Q., Frangeskou, A. C., Stimpson, G. A., Breeze, B. G., Nikitin, A., Dale, M. W., Nichols, E. C., Thornley, W., Green, B. L., Newton, M. E., Edmonds, A. M., Markham, M. L., Twitchen, D. J., Morley, G. W.
Publikováno v:
Phys. Rev. Applied 14, 044058 (2020)
Sensing small magnetic fields is relevant for many applications ranging from geology to medical diagnosis. We present a fiber-coupled diamond magnetometer with a sensitivity of (310 $\pm$ 20) pT$/\sqrt{\text{Hz}}$ in the frequency range of 10-150 Hz.
Externí odkaz:
http://arxiv.org/abs/2002.08255
Publikováno v:
Review of Scientific Instruments 90, 094701 (2019)
We present characterization of a lock-in amplifier based on a field programmable gate array capable of demodulation at up to 50 MHz. The system exhibits 90 nV/sqrt(Hz) of input noise at an optimum demodulation frequency of 500 kHz.The passband has a
Externí odkaz:
http://arxiv.org/abs/1811.10494
Autor:
Stephen, C. J., Green, B. L., Lekhai, Y. N. D., Weng, L., Hill, P., Johnson, S., Frangeskou, A. C., Diggle, P. L., Strain, M. J., Gu, E., Newton, M. E., Smith, J. M., Salter, P. S., Morley, G. W.
Publikováno v:
Phys. Rev. Applied 12, 064005 (2019)
Three-dimensional arrays of silicon transistors increase the density of bits. Solid-state qubits are much larger so could benefit even more from using the third dimension given that useful fault-tolerant quantum computing will require at least 100,00
Externí odkaz:
http://arxiv.org/abs/1807.03643
Publikováno v:
Review of Scientific Instruments 89, 023109 (2018)
Interferometric position detection of levitated particles is crucial for the centre-of-mass (CM) motion cooling and manipulation of levitated particles. In combination with balanced detection and feedback cooling, this system has provided picometer s
Externí odkaz:
http://arxiv.org/abs/1710.01159