Phys. Rev. Lett. 94, 203002 (2005) [4 pages]Suppression of Spin Projection Noise in Broadband Atomic MagnetometrySee Also: Erratum Received 2 September 2003; revised 15 February 2005; published 24 May 2005 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.203002
DOI:
10.1103/PhysRevLett.94.203002
PACS:
32.80.Qk, 06.20.-f, 32.80.Pj
See AlsoErratum: J. M. Geremia, John K. Stockton, and Hideo Mabuchi, Erratum: Suppression of Spin Projection Noise in Broadband Atomic Magnetometry [Phys. Rev. Lett. 94, 203002 (2005)], Phys. Rev. Lett. 101, 039902 (2008). |
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