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Magnetic Field Estimation at and beyond 1/N Scaling via an Effective Nonlinearity

arXiv
Authors: Bradley A. Chase, Heather L. Partner, Brigette D. Black, Benjamin Q. Baragiola, Robert L. Cook, JM Geremia

Year

2007

Paper ID

49314

Status

Preprint

Abstract Read

~2 min

Abstract Words

66

Citations

N/A

Abstract

We 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.

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  • We 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...

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