Ultrasensitive magnetic-field sensing (IMAGE)

Science China Press

Ultrasensitive magnetic-field sensing

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Magnetic sensitivity of the spin-amplifier-based magnetometer. 18 fT/Hz1/2 is achieved at 129Xe Larmor frequency, which is beyond the photon-shot-noise limit and comparable to the spin-projection-noise limit of the 87Rb magnetometer itself. (c) Magnetic sensitivity of the Floquet-maser-based magnetometer. 700 fT/Hz1/2 is achieved and is currently the best sensitivity.

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