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Magnetic Field Sensing Beyond the Standard Quantum Limit Using 10-Spin NOON States
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- Jonathan A. Jones
- Centre for Advanced Electron Spin Resonance (CAESR), Clarendon Laboratory, Oxford University, Oxford OX1 3PU, UK.
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- Steven D. Karlen
- Department of Materials, Oxford University, Oxford OX1 3PH, UK.
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- Joseph Fitzsimons
- Department of Materials, Oxford University, Oxford OX1 3PH, UK.
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- Arzhang Ardavan
- Centre for Advanced Electron Spin Resonance (CAESR), Clarendon Laboratory, Oxford University, Oxford OX1 3PU, UK.
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- Simon C. Benjamin
- Department of Materials, Oxford University, Oxford OX1 3PH, UK.
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- G. Andrew D. Briggs
- Department of Materials, Oxford University, Oxford OX1 3PH, UK.
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- John J. L. Morton
- Centre for Advanced Electron Spin Resonance (CAESR), Clarendon Laboratory, Oxford University, Oxford OX1 3PU, UK.
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Description
<jats:title>Quantum-Enhanced Measurement</jats:title> <jats:p> The single electron spin in a molecule, atom, or quantum dot precesses in a magnetic field and so can be used as a magnetic field sensor. As the number of spins in a sensor increases, so too does the sensitivity. Quantum mechanical entanglement of the spin ensemble should then allow the sensitivity to increase much more than would be expected from a simple increase in the number of individual spins in the ensemble. Using the highly symmetric molecule, trimethyl phosphite, a molecule containing a central P atom surrounded by nine hydrogen atoms, <jats:bold> Jones <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="1166" related-article-type="in-this-issue" vol="324" xlink:href="10.1126/science.1170730">1166</jats:related-article> , published online 23 April) quantum mechanically entangled the 10 spins (or qubits) to generate a nearly 10-fold enhancement in the magnetic field sensitivity. The results pave the way for the further development of quantum sensors. </jats:p>
Journal
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- Science
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Science 324 (5931), 1166-1168, 2009-05-29
American Association for the Advancement of Science (AAAS)
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Details 詳細情報について
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- CRID
- 1363951793330804096
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- ISSN
- 10959203
- 00368075
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- Data Source
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- Crossref