CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Magnetic Field Measurement with Heisenberg Limit Based on Solid Spin NOON State |
ZHOU Lei-Ming, DONG Yang, SUN Fang-Wen** |
Key Laboratory of Quantum Information, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026
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Cite this article: |
ZHOU Lei-Ming, DONG Yang, SUN Fang-Wen 2015 Chin. Phys. Lett. 32 067601 |
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Abstract The maximum entangled number state (NOON state) can improve the sensitivity of physical quantity measurement to the Heisenberg limit 1/N. In this work, the magnetic field measurement based on the individual solid spin NOON state is investigated. Based on the tunable effective coupling coefficient, we propose a generation scheme of the three-spin NOON state, i.e, the Greenberger–Horne–Zeilinger (GHZ) state, and discussed the measurement resolution reduction due to decoherence. It is unnecessary to entangle spins as many as possible when decoherence exists. In practice, defect spins in diamond and 31P donors with long coherence time can be applied with current techniques in the nano-scaled high resolution magnetic measurement.
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Received: 26 January 2015
Published: 30 June 2015
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PACS: |
76.30.Mi
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(Color centers and other defects)
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71.70.Jp
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(Nuclear states and interactions)
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76.70.Hb
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(Optically detected magnetic resonance (ODMR))
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