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Ultra-High Q Acoustic Resonance in Superfluid ^4He

De Lorenzo, L. A. and Schwab, K. C. (2017) Ultra-High Q Acoustic Resonance in Superfluid ^4He. Journal of Low Temperature Physics, 186 (3). pp. 233-240. ISSN 0022-2291. doi:10.1007/s10909-016-1674-x.

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We report the measurement of the acoustic quality factor of a gram-scale, kilohertz-frequency superfluid resonator, detected through the parametric coupling to a superconducting niobium microwave cavity. For temperatures between 400 mK and 50 mK, we observe a T^(−4) temperature dependence of the quality factor, consistent with a 3-phonon dissipation mechanism. We observe Q factors up to 1.4×10^8, consistent with the dissipation due to dilute ^3He impurities, and expect that significant further improvements are possible. These experiments are relevant to exploring quantum behavior and decoherence of massive macroscopic objects, the laboratory detection of continuous gravitational waves from pulsars, and the probing of possible limits to physical length scales.

Item Type:Article
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URLURL TypeDescription Paper ReadCube access
Schwab, K. C.0000-0001-8216-4815
Additional Information:© 2016 Springer Science+Business Media New York. Received: 26 July 2016; Accepted: 07 October 2016; First Online: 07 November 2016. We acknowledge funding provided by the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (NSF IQIM-1125565) with support of the Gordon and Betty Moore Foundation (GBMF-1250) NSF DMR-1052647, and DARPA-QUANTUM HR0011-10-1-0066. L.D. acknowledges support from the NSF GRFP under Grant No. DGE-1144469.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationGBMF-1250
Defense Advanced Research Projects Agency (DARPA)HR0011-10-1-0066
NSF Graduate Research FellowshipDGE-1144469
Issue or Number:3
Record Number:CaltechAUTHORS:20161109-083656556
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Official Citation:De Lorenzo, L.A. & Schwab, K.C. J Low Temp Phys (2017) 186: 233. doi:10.1007/s10909-016-1674-x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:71867
Deposited By: Tony Diaz
Deposited On:09 Nov 2016 17:42
Last Modified:11 Nov 2021 04:52

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