Physicists build new device that is foundation for quantum computing

The ability to precisely tune the degree of nonreciprocity is an important tool to have in quantum information processing. In doing so, the team derived a general and widely applicable theory that simplifies and expands upon older understandings of nonreciprocity so that future work on similar topics can take advantage of the team's model, even when using different components and platforms.

Furthermore, a property called"nonreciprocity" can create additional avenues for quantum computing to leverage the potential of the quantum world. To control nonreciprocity, lead author Ying-Ying Wang, graduate student in physics at UMass Amherst, and her co-authors ran a series of simulations to determine the design and properties their circulator would need to have in order for them to vary its nonreciprocity. They then built their circulator and ran a host of experiments not just to prove their concept, but to understand exactly how their device enabled nonreciprocity.

"This is the first demonstration of embedding nonreceptivity into a quantum computing device," says Chen Wang,"and it opens the door to engineering more sophisticated quantum computing hardware."

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