Noiseless Quantum Measurement and Squeezing of Microwave Fields Utilizing Mechanical Vibrations
Ockeloen-Korppi, C. F., Damskägg, E., Pirkkalainen, J.-M., Heikkilä, T., Massel, F., & Sillanpää, M. (2017). Noiseless Quantum Measurement and Squeezing of Microwave Fields Utilizing Mechanical Vibrations. Physical Review Letters, 118 (10), 103601. doi:10.1103/PhysRevLett.118.103601
Published inPhysical Review Letters
© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.
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 phasesensitive measurement using a cavity optomechanical scheme, characterized by an extremely small noise less than 0.2 quanta. The device also strongly squeezes microwave radiation 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.