Hybrid quantum magnetic-field sensor with an electron spin and a nuclear spin in diamond

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Description

Recently, magnetic field sensors based on an electron spin of a nitrogen vacancy (NV) center in diamond have been studied both from an experimental and theoretical point of view. This system provides a nanoscale magnetometer, and it is possible to detect a precession of a single spin. In this paper, we propose a sensor consisting of an electron spin and a nuclear spin in diamond. Although the electron spin has a reasonable interaction strength with magnetic field, the coherence time of the spin is relatively short. On the other hand, the nuclear spin has a longer life time while the spin has a negligible interaction with magnetic fields. We show that, through the combination of such two different spins via the hyperfine interaction, it is possible to construct a magnetic field sensor with the sensitivity far beyond that of previous sensors using just a single electron spin.

Journal

  • Physical Review A

    Physical Review A 94 (5), 052330-, 2016-11-22

    American Physical Society (APS)

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