Approaching the Quantum Limit of a Nanomechanical Resonator

Matthew Lahaye, O. Buu, B. Camarota, K. C. Schwab

Research output: Contribution to journalArticle

720 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

Cite this

Lahaye, M., Buu, O., Camarota, B., & Schwab, K. C. (2004). Approaching the Quantum Limit of a Nanomechanical Resonator. Science, 304(5667), 74-77.