Acoustic Purcell boost pairs a diamond color center with a nanomechanical cavity
Researchers build a microwave‑frequency nanomechanical resonator around a single silicon‑vacancy center in diamond and use a co‑localized optical mode to access the excited state, observing an acoustic Purcell effect that speeds spin relaxation by ~10× when the qubit is in resonance with a 12 GHz mode, while also using the color center as a probe to map the device’s phonon spectrum up to 28 GHz, establishing a new control regime for quantum defects and paving the way for phonon‑based interconnects between memories and qubits.