Physicists measured Earth’s rotation using quantum entanglement
The experiment is a step toward testing how quantum physics interfaces with gravity
![Red squiggles representing photons are sent into a loop representing the optical fiber in an interferometer, which surrounds Earth on a starry backdrop](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2024/06/061324_ec_earth-entangle_feat.jpg?fit=1030%2C580&ssl=1)
In a laboratory experiment, scientists sent entangled photons (red squiggles) into an interferometer (illustrated) that was sensitive enough to measure Earth’s rotation.
Marco Di Vita