Observation of zero-point noise squeezing via a Josephson-parametric amplifier
R. Movshovich, B. Yurke, P. G. Kaminsky, A. D. Smith, A. H. Silver, R. W. Simon, M. V. Schneider
DOI 10.1103/PhysRevLett.65.1419 · Physical Review Letters
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Abstract
We have demonstrated (47±8)% squeezing of vacuum-fluctuation noise using a Josephson-parametric amplifier operated at 19.16 GHz. The amplifier was operated at 30 mK and has a double-sideband noise temperature of 0.446 K. This is comparable to the vacuum noise floor hν/2k=0.460 K.
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