While many plans for quantum computers transmit data using the particles of light known as photons, researchers from the University of Chicago Pritzker School of Molecular Engineering (UChicago PME) are turning to sound. In a new paper out today in Nature Physics, a team uniting UChicago PME’s experimentalist Cleland Lab and theoretical Jiang Group demonstrated deterministic phase control of phonons, tiny mechanical vibrations that, on a much larger scale, would be considered sound. By removing the randomness inherent in photon-based systems, this phase control could give sound an edge over light in building tomorrow’s quantum computers.

Researchers at the Hebrew University of Jerusalem and the Humboldt University in Berlin have developed a way to capture nearly all the light emitted from tiny diamond defects known as color centers. By placing nanodiamonds into specially designed hybrid nanoantennas with extreme precision, the team achieved record photon collection at room temperature— a necessary step for quantum technologies such as quantum sensors, and quantum-secured communications. The article was selected as a Featured Article in APL Quantum.

A new paper by UMBC researchers, led by physicist Sebastian Deffner, demonstrates quantum computing’s potential to optimize urban train scheduling, using Baltimore’s Light RailLink as a model. Their study, published with collaborators from the Polish Academy of Sciences, leverages quantum “noise” to model unpredictable train delays. Tested on IonQ and D-Wave quantum devices, the approach solves small-scale scheduling but highlights the need for advanced hardware for larger networks. This interdisciplinary work could revolutionize logistics, finance, and drug discovery by tackling complex systems affected by randomness.