Finnish team devise nanomechanical microwave amplifier with near least possible noise generation

(PhysOrg.com) -- A team of Finnish physicists has developed a novel way to amplify a microwave signal that unlike other amplifiers, produces noise that is just barely above that which is necessary due to the laws of quantum mechanics. The team, as they describe in their paper published in Nature, use a microwave cavity and a mechanical resonator to amplify a signal by 25 decibels while introducing a noise that is just 20 times the quantum limit.

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