We're cooling quantum bits using sound waves to make them 100x more precise.
Using a 'phononic bath' (vibrations) to reset superconducting qubits achieves much higher fidelity than electronic methods. It's a counterintuitive hardware shift that significantly reduces the noise floor for quantum computation.
High-Fidelity Transmon Reset with a Multimode Acoustic Resonator
arXiv · 2604.08655
Achieving sufficiently low residual excited-state populations remains a key challenge in superconducting quantum circuits, particularly for protocols operating close to noise limits or requiring repeated qubit initialization. Existing protocols primarily address this challenge through sophisticated control, engineered dissipation, or feedback mechanisms. Here, we demonstrate an alternative approach in which a superconducting qubit is reset using a physically distinct, intrinsically colder phonon