First mechanical qubit is similar to a drum skin that is simultaneously vibrating and still

https://spectrum.ieee.org/mechanical-qubit

"harmonic mechanical resonators using small evenly spaced energy between vibrating states, coupled to anharmonic electromagnetic qubit... 200 ms prototype mechanical qubit coherence time 2X that of superconducting qubit... piezoelectric disk on sapphire slab mechanical resonator, connected to superconducting qubit on separate sapphire chip as anharmonic... mechanical quantum computers running long complex programs, quantum sensors"