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  Quantum-Dense Metrology

Steinlechner, S., Bauchrowitz, J., Meinders, M., Müller-Ebhardt, H., Danzmann, K., & Schnabel, R. (2013). Quantum-Dense Metrology. Nature Photonics, 7: 150, pp. 626-630. doi:10.1038/nphoton.2013.150.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-7681-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-148A-9
Genre: Journal Article

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 Creators:
Steinlechner, Sebastian1, Author              
Bauchrowitz, Jöran1, Author              
Meinders, Melanie, Author
Müller-Ebhardt, Helge1, Author              
Danzmann, Karsten1, Author              
Schnabel, Roman1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Quantum metrology utilizes entanglement for improving the sensitivity of measurements. Up to now the focus has been on the measurement of just one out of two non-commuting observables. Here we demonstrate a laser interferometer that provides information about two non-commuting observables, with uncertainties below that of the meter's quantum ground state. Our experiment is a proof-of-principle of quantum dense metrology, and uses the additional information to distinguish between the actual phase signal and a parasitic signal due to scattered and frequency shifted photons. Our approach can be readily applied to improve squeezed-light enhanced gravitational-wave detectors at non-quantum noise limited detection frequencies in terms of a sub shot-noise veto-channel.

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 Dates: 2012-11-15201320132013
 Publication Status: Published in print
 Pages: 5 pages, 3 figures; includes supplementary materials
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1211.3570
DOI: 10.1038/nphoton.2013.150
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Title: Nature Photonics
Source Genre: Journal
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Pages: - Volume / Issue: 7 Sequence Number: 150 Start / End Page: 626 - 630 Identifier: ISSN: 1749-4885
CoNE: /journals/resource/1000000000240270