Preprint
Sep 2026
Enhanced Atomic Magnetometry with a Pinched Spin State
The sensitivity of an atomic spin sensor is fundamentally constrained by the quantum Fisher information (QFI) of the probe state. The pinched state, $|{F,0}\rangle$, has an $(F+1)$-fold larger single-particle QFI for transverse-field sensing than the stretched state, $|{F,F}\rangle$, corresponding to a predicted $\sqrt...
Ting-Xuan Guo, Xiang-Yu Li, Yang Li et al.
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