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Quantum experiments explore modifications to the Schrödinger equation. We show that for optomechanical systems, smaller masses are more sensitive to decoherence from noise, contrary to common belief.

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Area of Science:

  • Quantum mechanics
  • Optomechanics
  • Nanotechnology

Background:

  • Nanomechanical oscillators are used to test quantum mechanics modifications.
  • Increased mass is generally thought to increase sensitivity to quantum decoherence.

Purpose of the Study:

  • Investigate the effect of mass on decoherence in quantum experiments.
  • Determine conditions to distinguish noise-induced decoherence from collapse-induced decoherence.

Main Methods:

  • Theoretical analysis of optomechanical systems.
  • Modeling of generic noise sources (thermal, measurement).
  • Analysis of continuous optomechanical force measurements.

Main Results:

  • Sensitivity to unconventional quantum effects decreases with increasing mass in optomechanical systems.
  • Conditions are identified to differentiate noise-induced decoherence from collapse-induced decoherence.

Conclusions:

  • The mass-decoherence relationship in optomechanics is counterintuitive.
  • Distinguishing quantum decoherence sources is crucial for future quantum experiments.