Suppression of Spin Projection Noise in Broadband Atomic Magnetometry

Journal Article · Fri May 27 00:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.94.203002· OSTI ID:20696307

Geremia, J M; Stockton, John K; Mabuchi, Hideo ^[1]

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1. Physics and Control and Dynamical Systems, California Institute of Technology, Pasadena California 91125 (United States)

We demonstrate that quantum nondemolition measurement, combined with a suitable parameter estimation procedure, can improve the sensitivity of a broadband atomic magnetometer by reducing uncertainty due to spin projection noise. Furthermore, we provide evidence that real-time quantum feedback control offers robustness to classical uncertainties, including shot-to-shot atom number fluctuations, that would otherwise prevent quantum-limited performance.

• OSTI ID: 20696307
• Journal Information: Physical Review Letters, Vol. 94, Issue 20; Other Information: DOI: 10.1103/PhysRevLett.94.203002; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
CESIUM
FEEDBACK
FLUCTUATIONS
HYPERFINE STRUCTURE
MAGNETIC MOMENTS
MAGNETOMETERS
NOISE
SENSITIVITY
SPIN
SUPERCONDUCTORS