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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Abstract
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.
| Item Type: | Article |
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| 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 |
| Record Number: | CaltechAUTHORS:GERprl05 |
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:GERprl05 |
| Alternative URL: | http://dx.doi.org/10.1103/PhysRevLett.94.203002 |
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 3048 |
| Collection: | CaltechAUTHORS |
| Deposited By: | Tony Diaz |
| Deposited On: | 12 May 2006 |
| Last Modified: | 26 Dec 2012 08:52 |
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