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Mitigating Quantum Decoherence in Force Sensors by Internal Squeezing.

M Korobko1, J Südbeck1, S Steinlechner2,3

  • 1Institut für Quantenphysik und Zentrum für Optische Quantentechnologien der Universität Hamburg, 5 Luruper Chaussee 149, 22761 Hamburg, Germany.

Physical Review Letters
|October 20, 2023
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Summary
This summary is machine-generated.

Quantum decoherence limits laser interferometric force sensors. A new quantum squeeze operation inside the cavity mitigates this, enhancing measurement sensitivity independently of optical loss for advanced quantum sensing.

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Area of Science:

  • Quantum optics
  • Precision measurement
  • Sensor technology

Background:

  • Laser interferometric force sensing relies on squeezed vacuum states for maximal efficiency.
  • Quantum decoherence, caused by optical losses, is a primary limitation to sensor sensitivity.
  • Existing methods struggle with decoherence, hindering the use of squeezed light in high-precision applications.

Purpose of the Study:

  • To investigate the mitigation of quantum decoherence in laser interferometric force sensors.
  • To demonstrate a novel quantum squeeze operation within the sensor cavity to enhance performance.
  • To provide theoretical and experimental evidence for improved measurement sensitivity.

Main Methods:

  • Utilizing optical cavities and squeezed light injection in a laser interferometric force sensor.
  • Implementing a quantum squeeze operation directly inside the sensor's optical cavity.
  • Conducting experiments to measure sensor sensitivity under varying optical loss conditions.

Main Results:

  • Demonstrated mitigation of quantum decoherence through an in-cavity quantum squeeze operation.
  • Achieved enhanced measurement sensitivity that is robust against optical readout loss.
  • Provided theoretical and experimental validation of the proposed method.

Conclusions:

  • The in-cavity quantum squeeze operation effectively combats decoherence in high-precision force sensors.
  • This technique enables quantum-enhanced measurements in environments with significant optical loss.
  • The findings open new avenues for quantum sensor development and high-precision measurement technologies.