Approaching the quantum limit of a nanomechanical resonator.

@article{LaHaye2004ApproachingTQ,
  title={Approaching the quantum limit of a nanomechanical resonator.},
  author={Matthew D LaHaye and Olivier Buu and Benedetta Camarota and Keith C. Schwab},
  journal={Science},
  year={2004},
  volume={304 5667},
  pages={
          74-7
        }
}
By coupling a single-electron transistor to a high-quality factor, 19.7-megahertz nanomechanical resonator, we demonstrate position detection approaching that set by the Heisenberg uncertainty principle limit. At millikelvin temperatures, position resolution a factor of 4.3 above the quantum limit is achieved and demonstrates the near-ideal performance of the single-electron transistor as a linear amplifier. We have observed the resonator's thermal motion at temperatures as low as 56… CONTINUE READING

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