期刊
PHYSICAL REVIEW LETTERS
卷 118, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.103601
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资金
- Academy of Finland [250280, CoE LTQ, 275245]
- European Research Council [240387-NEMSQED, 240362-Heattronics, 615755-CAVITYQPD]
- Horizon programme [FETPROACT-2016 732894-HOT]
- Centre for Quantum Engineering at Aalto University
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.
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