Noiseless quantum measurement and squeezing of microwave fields   utilizing mechanical vibrations
  A process which strongly amplifies both quadrature amplitudes of an oscillatory signal necessarily adds noise. Alternatively, if the information in one quadrature is lost in phase-sensitive amplification, it is possible to completely reconstruct the other quadrature. Here we demonstrate such a nearly perfect phase-sensitive measurement using a cavity optomechanical scheme, characterized by an extremely small noise less than 0.2 quanta. We also observe microwave radiation strongly squeezed by 8 dB below vacuum. A source of bright squeezed microwaves opens up applications in manipulations of quantum systems, and noiseless amplification can be used even at modest cryogenic temperatures. 
C. F. Ockeloen-Korppi, E. Damsk\"agg, J.-M. Pirkkalainen, T. T.   Heikkil\"a, F. Massel, and M. A. Sillanp\"a\"a
cond-mat.mes-hall quant-ph