Optimization of all-optical MX resonance in Cs in ultra-weak fields yields 4x sensitivity gain to 3 fT/Hz^{1/2} via partial spin-exchange suppression, with a semi-empirical model for incomplete broadening.
Cohen, Magnetoencephalography: Detection of the Brain’s Electrical Activity with a Superconducting Magnetometer, Science 175, 664 (1972)
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Ultimate parameters of an all-optical MX resonance in Cs in ultra-weak magnetic field
Optimization of all-optical MX resonance in Cs in ultra-weak fields yields 4x sensitivity gain to 3 fT/Hz^{1/2} via partial spin-exchange suppression, with a semi-empirical model for incomplete broadening.