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arXiv · 1610.09980

Noiseless quantum measurement and squeezing of microwave fields utilizing mechanical vibrations

C. F. Ockeloen-Korppi·E. Damskägg·J. -M. Pirkkalainen·T. T. Heikkilä·F. Massel·M. A. Sillanpää
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Abstract

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.

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C. F. Ockeloen-Korppi, E. Damskägg, J. -M. Pirkkalainen, T. T. Heikkilä, F. Massel, M. A. Sillanpää. 2016-10-31. Noiseless quantum measurement and squeezing of microwave fields utilizing mechanical vibrations. https://doi.org/10.1103/physrevlett.118.103601

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