Pushing the limits of measurement accuracy with quantum sensors
Scientists at PTB’s QUEST Institute and at Leibniz Universität Hannover, together with researchers at the Institute for Theoretical Physics at Leibniz Universität Hannover and at the National Institute of Optics in Florence, Italy, have developed a method that exploits quantum-mechanical states to determine two quantities more accurately than classical states allow. In this way, high-precision spectroscopic investigations performed on molecules can be used to investigate a possible interaction between conventional and dark matter. This measurement principle, which has been demonstrated for the first time, could also improve the resolution in optical interferometers such as gravitational wave detectors, thus enabling deeper insight into the early days of the universe. They have reported on their findings in Nature Communications.