Quantum Campus shares the latest in quantum science and technology. Read by more than 2,000 researchers, we publish on Fridays and are always looking for news from across the country. Want to see your work featured? Submit your ideas to the editor.

Researchers at Virginia Tech and Oak Ridge National Lab demonstrated what they call an “acoustic atom.” The chip-scale device traps and controls transitions between acoustic waves’ energy levels, mimicking the behavior of atoms and, perhaps one day, serving as an interface for quantum hardware.

“Ultimately, we hope this platform provides a new, highly compact way to process signals and perform analog acoustic computing directly on a chip,” Linbo Shao said. “Right now, we’re using classical, coherent microwave sources to drive the acoustic waves. There’s a long way to get this down to the single phonon level, but we’re optimistic that all those will happen soon.”

This work was published in Physical Review Letters.

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Engineers at Virginia Commonwealth used magnets about 200 nanometers in size and nearfield microwaves to control a nitrogen-vacancy center-based spin qubit.

“We are making a unique control mechanism. These qubits store information for a long time and can operate at high temperatures,” Fahim Chowdhury, the study’s lead author, said. “But scalable implementation with many qubits on a single chip remains a key challenge.”

This work was published in Nature Communications.

Johns Hopkins’ physicists proposed a comprehensive noise-modeling framework for superconducting qubits. Using 39 qubits across seven superconducting processors on IBM’s quantum platform, they were able to predict single- and two-qubit behaviors, including non-Markovian effects resulting from spatiotemporally correlated noise sources, with seven times better accuracy than conventional approaches.

This work was published in PRX Quantum.

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