“Our findings may open a route toward compact gravitational-wave sensing, where the relevant atomic ensemble is millimeter-scale,” said Navdeep Arya, a postdoctoral researcher at Stockholm University. “A thorough noise analysis is necessary to assess practical feasibility, but our first estimates are promising.”

If confirmed, this approach could eventually lead to much smaller and more accessible detectors, offering a new way to observe some of the universe’s most dramatic events.