New nanomechanical oscillators with record-low loss

The vibrational modes of nanomechanical resonators are analogous to different notes of a guitar string and have similar properties such as frequency (pitch) and lifetime. The lifetime is characterized by the quality factor, which is the number of times that the resonator oscillates until its energy is reduced by 70%. The quality factor is crucial for the modern applications of mechanical resonators as it determines the level of thermal noise, which is a limit for sensing weak forces and observation of quantum effects.

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