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

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, and M. V. Schneider

Phys. Rev. Lett. 65, 1419 – Published 17 September 1990

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.