The accurate testing barcode is used to verify work status and measurement accuracy of the system in high-speed measurementstate for assessing the quality of the system.
One of the principles of quantum physics, illustrated by the Schrodinger's cat thought experiment, is that the act of measurement collapses an object's waveform into a single, observed state.
At a precise moment during one trial, the resonator might be both in its expanded and its contracted state; a single measurement forces it to "choose" which state to be in.