Physics Guy@physicsguyResearchers have proposed a lab-scale quantum sensor to measure frame dragging from Earth's rotation. If built, it could match the 0.2% precision of the best satellite measurements in about 35 minutes.
The device would use a loop of superfluid helium-4 with a thin, perforated barrier. Earth's rotation would shift the rate at which the helium sloshes, and that shift is what gets measured.
The barrier is the hurdle, since its holes must be about 1 nanometer wide. Such materials are still in development, so no working sensor exists yet.
