Quantum sensor breakthrough could reveal dark matter and ancient gravitational waves

Imperial College London researchers have demonstrated that a prototype quantum sensor with two clouds of ultracold atoms can eliminate laser noise and recover signals otherwise lost in interference. The college announced the advance on July 7, 2026 according to ScienceDaily. The tabletop system at the Imperial Ultracold Strontium Laboratory used two widely separated clouds of ultracold strontium-87 atoms measured with a single ultrastable clock laser. Researchers added large amounts of extra phase noise to simulate real world conditions for long baseline detectors. Each interferometer alone became unusable but comparing the pair recovered the signal at the quantum limit. An oscillating signal simulating the effect of a gravitational wave or dark matter field was detectable only when data from both was combined. The demonstration provides the first experimental confirmation of the noise cancellation technique central to future detectors. The work is part of the Atom Interferometer Observatory and Network (AION) UK wide collaboration led