2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/226530We provide evidence, based on direct simulation of the quantum Fisher information, that 1/N scaling of the sensitivity with the number of atoms N in an atomic magnetometer can be surpassed by double-passing a far-detuned laser through the atomic system during Larmor precession. Furthermore, we predict that for N>>1, the proposed double-pass atomic magnetometer can essentially achieve 1/N scaling without requiring any appreciable amount of entanglement.Please visit http://qmc.phys.unm.edu/ to download additional resources, including all source code and data files used to produce this manuscriptQuantum Physicstext