Approaching the standard quantum limit of mechanical torque sensing

@article{Kim2016ApproachingTS,
  title={Approaching the standard quantum limit of mechanical torque sensing},
  author={Paul H. Kim and B. D. Hauer and Callum Doolin and F. Souris and J P Davis},
  journal={Nature Communications},
  year={2016},
  volume={7}
}
Reducing the moment of inertia improves the sensitivity of a mechanically based torque sensor, the parallel of reducing the mass of a force sensor, yet the correspondingly small displacements can be difficult to measure. To resolve this, we incorporate cavity optomechanics, which involves co-localizing an optical and mechanical resonance. With the resulting enhanced readout, cavity-optomechanical torque sensors are now limited only by thermal noise. Further progress requires thermalizing such… Expand
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