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Proceedings Paper

Cooling a nanomechanical resonator using feedback: toward quantum behavior
Author(s): Asa Hopkins; Kurt A. Jacobs; Salman Habib; Keith Schwab
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Paper Abstract

Nano-electro-mechanical devices are now rapidly approaching the point where it will be possible to observe quantum mechanical behavior. However, for such behavior to be visible it is necessary to reduce the thermal motion of these devices down to temperatures in the millikelvin range. Here we consider the use of feedback control for this purpose. We analyze an experimentally realizable situation in which the position of the resonator is continuously monitored by a Single-Electron Transistor. Because the resonator is harmonic, it is possible to use a classical description of the measurement process, and we discuss both the quantum and classical descriptions. Because of this the optimal feedback algorithm can be calculated using classical control theory. We examine the quantum state of the controlled oscillator, and the achievable effective temperature. Our estimates indicate that with current experimental technology, feedback cooling is likely to bring the required milliKelvin temperatures within reach.

Paper Details

Date Published: 2 April 2004
PDF: 11 pages
Proc. SPIE 5276, Device and Process Technologies for MEMS, Microelectronics, and Photonics III, (2 April 2004); doi: 10.1117/12.522091
Show Author Affiliations
Asa Hopkins, California Institute of Technology (United States)
Los Alamos National Lab. (United States)
Kurt A. Jacobs, Los Alamos National Lab. (United States)
Griffith Univ. (Australia)
Salman Habib, Los Alamos National Lab. (United States)
Keith Schwab, Univ. of Maryland/College Park (United States)

Published in SPIE Proceedings Vol. 5276:
Device and Process Technologies for MEMS, Microelectronics, and Photonics III
Jung-Chih Chiao; Alex J. Hariz; David N. Jamieson; Giacinta Parish; Vijay K. Varadan, Editor(s)

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