Experimental demonstration of the sensitivity of an optically pumped quantum magnetometer
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- Alexandrov, E.B., Balabas, M.V., Vershovski, A.K. et al. Tech. Phys. (2004) 49: 779. doi:10.1134/1.1767891
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The sensitivity σ of an optically pumped quantum magnetometer is measured directly by comparing the output frequencies of 85Rb and 87Rb magnetometers integrated in a single two-isotope cell. The result σ87=59.6±6 fT Hz−1/2 agrees well with the value σ87light=53.7±2 fT Hz−1/2 obtained indirectly by measuring 87 the ratio of the resonance steepness to the shot noise of light.