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Updated: Jun 28, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Hybrid SU(1,1) Interferometry in Optomechanics.

Chao Meng1, Emil Zeuthen1, Polina R Sharapova2

  • 1University of Copenhagen, Niels Bohr Institute, Blegdamsvej 17, 2100 Copenhagen Ø, Denmark.

Physical Review Letters
|June 26, 2026
PubMed
Summary

This study introduces a hybrid optomechanical system for precision interferometry. It achieves sub-shot-noise phase detection, overcoming noise and loss challenges in quantum sensing.

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Area of Science:

  • Quantum optics
  • Optomechanics
  • Precision measurement

Background:

  • Standard interferometers use beam splitters, limiting sensitivity.
  • SU(1,1) interferometers offer enhanced sensitivity using two-mode squeezers.
  • Quantum entanglement provides robustness against detection losses.

Purpose of the Study:

  • To propose a hybrid optomechanical implementation of a nondegenerate SU(1,1) interferometer.
  • To demonstrate sub-shot-noise phase detection in a hybrid system.
  • To investigate robustness against mechanical thermal noise and optical losses.

Main Methods:

  • Replaced beam splitters with two-mode squeezers in a SU(1,1) interferometer.
  • Implemented a hybrid system combining a mechanical mode and an optical field.
  • Engineered two consecutive, mode-matched interactions between the optical and mechanical modes.

Main Results:

  • Achieved sub-shot-noise phase sensitivity without requiring input squeezing.
  • Demonstrated robustness to detection losses through quantum entanglement.
  • Showcased the potential for high-precision phase detection even with thermal noise.

Conclusions:

  • The proposed hybrid optomechanical SU(1,1) interferometer advances precision interferometry.
  • This approach offers a pathway to enhanced quantum sensing in hybrid systems.
  • The method provides a robust platform for sub-shot-noise measurements.