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  • Letter
  • Open Access

Ultrastrong linear optomechanical interaction

Kahan Dare1,2, Jannek J. Hansen1, Iurie Coroli1, Aisling Johnson1, Markus Aspelmeyer1,2, and Uroš Delić1,*

  • 1University of Vienna, Faculty of Physics, Vienna Center for Quantum Science and Technology, A-1090 Vienna, Austria
  • 2Institute for Quantum Optics and Quantum Information (IQOQI) Vienna, Austrian Academy of Sciences, A-1090 Vienna, Austria

  • *Contact author: uros.delic@univie.ac.at
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Phys. Rev. Research 6, L042025 – Published 25 October, 2024

DOI: https://doi.org/10.1103/PhysRevResearch.6.L042025

Abstract

Light-matter interaction in the ultrastrong coupling regime can be used to generate exotic ground states with two-mode squeezing and may be useful for quantum-enhanced sensing. Current demonstrations of ultrastrong coupling have been performed in fundamentally nonlinear systems. We report a cavity optomechanical system that operates in the linear coupling regime, reaching a maximum coupling of gx/Ωx=0.55±0.02. Such a system is inherently unstable, which may in the future enable strong mechanical squeezing.

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Phys. Rev. Research 6, L042025– Published 25 October, 2024
  • Received 26 May 2023
  • Accepted 19 September 2024
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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