Mechanically detecting and avoiding the quantum fluctuations of a microwave field

J. Suh, A. J. Weinstein, C. U. Lei, E. E. Wollman, S. K. Steinke, Pierre Meystre, A. A. Clerk, K. C. Schwab

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

Quantum fluctuations of the light field used for continuous position detection produce stochastic back-action forces and ultimately limit the sensitivity. To overcome this limit, the back-action forces can be avoided by giving up complete knowledge of the motion, and these types of measurements are called "back-action evading" or "quantum nondemolition" detection. We present continuous two-tone back-action evading measurements with a superconducting electromechanical device, realizing three long-standing goals: detection of back-action forces due to the quantum noise of a microwave field, reduction of this quantum back-action noise by 8.5 T 0.4 decibels (dB), and measurement imprecision of a single quadrature of motion 2.4 T 0.7 dB below the mechanical zero-point fluctuations. Measurements of this type will find utility in ultrasensitive measurements of weak forces and nonclassical states of motion.

Original languageEnglish (US)
Pages (from-to)1262-1265
Number of pages4
JournalScience
Volume344
Issue number6189
DOIs
StatePublished - 2014

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microwaves
electromechanical devices
quadratures
sensitivity

ASJC Scopus subject areas

  • General

Cite this

Suh, J., Weinstein, A. J., Lei, C. U., Wollman, E. E., Steinke, S. K., Meystre, P., ... Schwab, K. C. (2014). Mechanically detecting and avoiding the quantum fluctuations of a microwave field. Science, 344(6189), 1262-1265. https://doi.org/10.1126/science.1253258

Mechanically detecting and avoiding the quantum fluctuations of a microwave field. / Suh, J.; Weinstein, A. J.; Lei, C. U.; Wollman, E. E.; Steinke, S. K.; Meystre, Pierre; Clerk, A. A.; Schwab, K. C.

In: Science, Vol. 344, No. 6189, 2014, p. 1262-1265.

Research output: Contribution to journalArticle

Suh, J, Weinstein, AJ, Lei, CU, Wollman, EE, Steinke, SK, Meystre, P, Clerk, AA & Schwab, KC 2014, 'Mechanically detecting and avoiding the quantum fluctuations of a microwave field', Science, vol. 344, no. 6189, pp. 1262-1265. https://doi.org/10.1126/science.1253258
Suh, J. ; Weinstein, A. J. ; Lei, C. U. ; Wollman, E. E. ; Steinke, S. K. ; Meystre, Pierre ; Clerk, A. A. ; Schwab, K. C. / Mechanically detecting and avoiding the quantum fluctuations of a microwave field. In: Science. 2014 ; Vol. 344, No. 6189. pp. 1262-1265.
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