Geremia, J. M. and Stockton, John K. and Mabuchi, Hideo (2005) Suppression of spin projection noise in broadband atomic magnetometry. Physical Review Letters, 94 (20). Art. No. 203002. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:GERprl05
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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.
|Additional Information:||©2005 The American Physical Society. Received 2 September 2003; revised 15 February 2005; published 24 May 2005. This work was supported by the NSF (PHY-9987541, EIA-0086038), the ONR (N00014-00-1-0479), and the Caltech MURI Center for Quantum Networks (DAAD19-00-1-0374). J. K. S. acknowledges the Hertz Foundation. We thank Ramon van Handel, Andrew Berglund, Michael Armen, Andrew Doherty, Dima Budker, and Dan Kleppner and Vladan Vuletic for helpful discussions.|
|Subject Keywords:||noise; atomic moments; magnetic moments; fluctuations; magnetic variables measurement; feedback; quantum theory; caesium; radiation pressure; heavy fermion superconductors; hyperfine structure|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||12 May 2006|
|Last Modified:||18 Sep 2014 18:11|
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