Increase of signal-to-noise ratio in weak value measurements

C. Byard; T. Graham; A. Danan; L. Vaidman; A. N. Jordan; P. Kwiat

doi:10.1007/978-88-470-5217-8_26

Increase of signal-to-noise ratio in weak value measurements

C. Byard, T. Graham, A. Danan, L. Vaidman, A. N. Jordan, P. Kwiat

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

We present a method for improving the signal-to-noise ratio of optical weak measurement techniques by recycling the non-post selected light.We designed a system that allows input photons to cycle through a Sagnac interferometer twice, effectively doubling the detected intensity. A deflection as small as 20 picoradians is discernible. The expected improvement for a shot-noise-limited system is a factor of ã2; however, we observed a larger signal-to-noise ratio enhancement (1.73) which can occur for systems limited by technical noise. [for a video of the talk given by Prof. Kwiat at the Aharonov-80 conference in 2012 at Chapman University, see quantum.chapman.edu/talk-5.]

Original language	English (US)
Title of host publication	Quantum Theory
Subtitle of host publication	A Two-Time Success Story: Yakir Aharonov Festschrift the Global Financial Crisis and the Indian Economy
Publisher	Springer
Pages	389-395
Number of pages	7
ISBN (Electronic)	9788847052178
ISBN (Print)	9788847052161
DOIs	https://doi.org/10.1007/978-88-470-5217-8_26
State	Published - Jan 1 2014

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General Physics and Astronomy

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10.1007/978-88-470-5217-8_26

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AU - Graham, T.

AU - Danan, A.

AU - Vaidman, L.

AU - Jordan, A. N.

AU - Kwiat, P.

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AB - We present a method for improving the signal-to-noise ratio of optical weak measurement techniques by recycling the non-post selected light.We designed a system that allows input photons to cycle through a Sagnac interferometer twice, effectively doubling the detected intensity. A deflection as small as 20 picoradians is discernible. The expected improvement for a shot-noise-limited system is a factor of ã2; however, we observed a larger signal-to-noise ratio enhancement (1.73) which can occur for systems limited by technical noise. [for a video of the talk given by Prof. Kwiat at the Aharonov-80 conference in 2012 at Chapman University, see quantum.chapman.edu/talk-5.]

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Increase of signal-to-noise ratio in weak value measurements

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