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Observation and interpretation of motional sideband asymmetry in a quantum electro-mechanical device

Weinstein, A. J. and Lei, C. U. and Wollman, E. E. and Suh, J. and Metelmann, A. and Clerk, A. A. and Schwab, K. C. (2014) Observation and interpretation of motional sideband asymmetry in a quantum electro-mechanical device. Physical Review X, 4 (4). Art. No. 041003. ISSN 2160-3308. doi:10.1103/PhysRevX.4.041003.

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Quantum electromechanical systems offer a unique opportunity to probe quantum noise properties in macroscopic devices, properties that ultimately stem from Heisenberg’s uncertainty relations. A simple example of this behavior is expected to occur in a microwave parametric transducer, where mechanical motion generates motional sidebands corresponding to the up-and-down frequency conversion of microwave photons. Because of quantum vacuum noise, the rates of these processes are expected to be unequal. We measure this fundamental imbalance in a microwave transducer coupled to a radio-frequency mechanical mode, cooled near the ground state of motion. We also discuss the subtle origin of this imbalance: depending on the measurement scheme, the imbalance is most naturally attributed to the quantum fluctuations of either the mechanical mode or of the electromagnetic field.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle Paper
Weinstein, A. J.0000-0002-2354-0777
Wollman, E. E.0000-0002-5474-3745
Suh, J.0000-0002-0112-0499
Clerk, A. A.0000-0001-7297-9068
Schwab, K. C.0000-0001-8216-4815
Additional Information:© 2014 The Authors. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Received 15 May 2014; revised manuscript received 31 July 2014; published 7 October 2014. We would like to acknowledge Yanbei Chen and Matthew Woolley for helpful discussions. This work is supported by funding provided by the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation (NSF-IQIM 1125565), by DARPA (DARPA-QUANTUM HR0011-10-1-0066), by the NSF (NSF-DMR 1052647 and NSF-EEC 0832819), and by the DARPA ORCHID Program under a grant from AFOSR.
Group:Institute for Quantum Information and Matter, Kavli Nanoscience Institute
Funding AgencyGrant Number
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)HR0011-10-1-0066
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20140515-160500332
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45780
Deposited By: Joy Painter
Deposited On:16 May 2014 20:05
Last Modified:10 Nov 2021 17:16

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