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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Gravimetry through non-linear optomechanics.

Sofia Qvarfort1, Alessio Serafini2, P F Barker2

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We introduce a novel quantum optomechanical system for precise gravity measurements. This method offers high sensitivity for gravitational accelerometry, potentially surpassing atomic interferometers.

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Area of Science:

  • Quantum physics
  • Optomechanics
  • Gravimetry

Background:

  • Precision gravimetry is crucial for diverse scientific and industrial fields.
  • Current quantum systems like atom interferometry have limitations.
  • Developing new methods for high-sensitivity gravitational acceleration measurement is essential.

Purpose of the Study:

  • To propose and investigate a new method for gravitational accelerometry using quantum optomechanical systems.
  • To analyze the fundamental sensitivity of a cavity optomechanical system for measuring gravitational acceleration.
  • To demonstrate the potential of this new approach to surpass existing technologies.

Main Methods:

  • Utilizing a cavity optomechanical system with trilinear radiation pressure light-matter interaction.
  • Analyzing the phase of the optical output to encode gravitational acceleration.
  • Proving homodyne detection as the optimal readout method analytically.

Main Results:

  • Predicted an ideal fundamental sensitivity of Δg = 10⁻¹⁵ ms⁻² for state-of-the-art optomechanical systems.
  • Demonstrated that the proposed method can surpass atomic interferometers even at low optical intensities.
  • Showed the scheme's robustness against the initial thermal state of the oscillator.

Conclusions:

  • Quantum optomechanical systems offer a promising new avenue for precision gravimetry.
  • The proposed method provides a highly sensitive and robust approach to measuring gravitational acceleration.
  • This technique has the potential to significantly advance applications in climate research, space exploration, and fundamental physics.