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Adaptive Homodyne Measurement of Optical Phase

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. doi:10.1103/PhysRevLett.89.133602.

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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.

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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).
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-00-1-0479
Issue or Number:13
Classification Code:PACS numbers: 42.50.Dv, 03.65.Ta, 03.67.–a, 06.90.+v
Record Number:CaltechAUTHORS:ARMprl02
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1826
Deposited By: Archive Administrator
Deposited On:20 Feb 2006
Last Modified:08 Nov 2021 19:42

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