Approaching the Quantum Limit of a Nanomechanical Resonator

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

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Abstract

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
JournalScience
Volume304
Issue number5667
DOIs
StatePublished - Apr 2 2004
Externally publishedYes

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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. https://doi.org/10.1126/science.1094419