"The device is so sensitive that it could be used to observe the minuscule impact of vacuum friction, a counterintuitive quantum effect in which an object spinning rapidly in empty space feels drag — despite being surrounded by nothingness. The never-before-seen effect is predicted to arise from interactions of the spinning object with electromagnetic fields that, according to quantum mechanics, appear and disappear constantly, even in empty space"
A new torque detector could spot quantum friction in a vacuum | Science News: Scientists have developed a torque sensor made with a nanoparticle that can spin more than 300 billion times a minute.
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