Armen, Michael A. and Au, John K. and Stockton, John K. and Doherty, Andrew C. and Mabuchi, Hideo (2002) Adaptive Homodyne Measurement of Optical Phase. Physical Review Letters, 89 (13). Art. no. 133602. ISSN 0031-9007 http://resolver.caltech.edu/CaltechAUTHORS:ARMprl02
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Abstract
We present an experimental demonstration of the power of feedback in quantum metrology, confirming the predicted [H. M. Wiseman, Phys. Rev. Lett. 75, 4587 (1995)] superior performance of an adaptive homodyne technique for single-shot measurement of optical phase. For measurements performed on weak coherent states with no prior knowledge of the signal phase, adaptive homodyne estimation approaches closer to the intrinsic quantum uncertainty than any previous technique. Our results underscore the importance of real-time feedback for reaching quantum limits in measurement and control.
| Item Type: | Article |
|---|---|
| Additional Information: | ©2002 The American Physical Society Received 1 April 2002; published 4 September 2002 This work was supported by the NSF (PHY-9987541, EIA-0086038) and ONR (N00014-00-1-0479). |
| Record Number: | CaltechAUTHORS:ARMprl02 |
| Persistent URL: | http://resolver.caltech.edu/CaltechAUTHORS:ARMprl02 |
| Alternative URL: | http://dx.doi.org/10.1103/PhysRevLett.89.133602 |
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
| ID Code: | 1826 |
| Collection: | CaltechAUTHORS |
| Deposited By: | Archive Administrator |
| Deposited On: | 20 Feb 2006 |
| Last Modified: | 26 Dec 2012 08:46 |
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