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  Beating the standard sensitivity-bandwidth limit of cavity-enhanced interferometers with internal squeezed-light generation

Korobko, M., Kleybolte, L., Ast, S., Miao, H., Chen, Y., & Schnabel, R. (2017). Beating the standard sensitivity-bandwidth limit of cavity-enhanced interferometers with internal squeezed-light generation. Physical Review Letters, 118: 143601. doi:10.1103/PhysRevLett.118.143601.

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 Creators:
Korobko, Mikhail, Author
Kleybolte, Lisa, Author
Ast, Stefan1, Author           
Miao, Haixing, Author
Chen, Yanbei, Author
Schnabel, Roman, Author
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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,General Relativity and Quantum Cosmology, gr-qc
 Abstract: The shot-noise limited peak sensitivity of cavity-enhanced interferometric measurement devices, such as gravitational-wave detectors, can be improved by increasing the cavity finesse, even when comparing fixed intra-cavity light powers. For a fixed light power inside the detector, this comes at the price of a proportional reduction in the detection bandwidth. High sensitivity over a large span of signal frequencies, however, is essential for astronomical observations. It is possible to overcome this standard sensitivity-bandwidth limit using non-classical correlations in the light field. Here, we investigate the internal squeezing approach, where the parametric amplification process creates a non-classical correlation directly inside the interferometer cavity. We analyse the limits of the approach theoretically, and measure 36% increase in the sensitivity-bandwidth product compared to the classical case. To our knowledge this is the first experimental demonstration of an improvement in the sensitivity-bandwidth product using internal squeezing, opening the way for a new class of optomechanical force sensing devices.

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 Dates: 2017-02-032017-02-132017
 Publication Status: Issued
 Pages: 5 pages, 3 figures
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 118 Sequence Number: 143601 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1