Approaching the Quantum Limit of a Nanomechanical Resonator

M. D. LaHaye, O. Buu, B. Camarota, K. C. Schwab

Research output: Contribution to journalArticlepeer-review

811 Scopus citations


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 millikelvin, with quantum occupation factors of NTH = 58. The implications of this experiment reach from the ultimate limits of force microscopy to qubit readout for quantum information devices.

Original languageEnglish (US)
Pages (from-to)74-77
Number of pages4
Issue number5667
StatePublished - Apr 2 2004
Externally publishedYes

ASJC Scopus subject areas

  • General


Dive into the research topics of 'Approaching the Quantum Limit of a Nanomechanical Resonator'. Together they form a unique fingerprint.

Cite this