EurekAlert2 min read
Physicists catch sound making a quantum jump in real time
Stanford researchers watched a tiny mechanical resonator’s vibration energy drop in a sudden jump — the first real-time observation of a quantum jump of sound (a phonon), after similar jumps were seen earlier in ions and light. They paired a long-ringing chip-scale resonator with a superconducting qubit that could repeatedly check whether the vibration was in energy state 1 or 0 without destroying the fragile state. The Science-linked result is a step toward sound-based quantum devices, sensing, and error detection — not a finished quantum computer.