A study in Nature reports a new quantum sensor that can effectively cancel
background noise limiting measurement precision, enabling searches for
previously undetectable weak signals and potentially informing the formation of
supermassive black holes. Imperial College London, which led the research, said
detecting the universe’s composition and new gravitational-wave sources requires
measurements of extremely weak signals. Atom interferometers use interference of
atomic matter waves, but the laser pulses required introduce noise that can
swamp those signals and prevent meaningful data.
