Intracavity Squeezing Can Enhance Quantum-Limited Optomechanical Position Detection through Deamplification

V. Peano, H. G. L. Schwefel, Ch. Marquardt, and F. Marquardt
Phys. Rev. Lett. 115, 243603 – Published 9 December 2015
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Abstract

It has been predicted and experimentally demonstrated that by injecting squeezed light into an optomechanical device, it is possible to enhance the precision of a position measurement. Here, we present a fundamentally different approach where the squeezing is created directly inside the cavity by a nonlinear medium. Counterintuitively, the enhancement of the signal-to-noise ratio works by deamplifying precisely the quadrature that is sensitive to the mechanical motion without losing quantum information. This enhancement works for systems with a weak optomechanical coupling and/or strong mechanical damping. This can allow for larger mechanical bandwidth of quantum-limited detectors based on optomechanical devices. Our approach can be straightforwardly extended to quantum nondemolition qubit detection.

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  • Received 25 March 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.243603

© 2015 American Physical Society

Authors & Affiliations

V. Peano1, H. G. L. Schwefel2,3,4, Ch. Marquardt2,3,5, and F. Marquardt1,3

  • 1Institute for Theoretical Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 7, 91058 Erlangen, Germany
  • 2Institute of Optics, Information and Photonics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 7, 91058 Erlangen, Germany
  • 3Max Planck Institute for the Science of Light, Günther-Scharowsky-Straße 1 Bau 24, 91058 Erlangen, Germany
  • 4Department of Physics, University of Otago, 730 Cumberland Street, Dunedin 9016, New Zealand
  • 5Department of Physics, Technical University of Denmark, Fysikvej, 2800 Kongens Lyngby, Denmark

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Issue

Vol. 115, Iss. 24 — 11 December 2015

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