When entangled atoms are pulled apart, quantum measurements become sharper

Researchers at the University of Basel have demonstrated that quantum entanglement can dramatically improve the precision of spatial field measurements by creating entangled atomic clouds and separating them into different locations. The breakthrough involves entangling ultracold atoms, then dividing the cloud into up to three spatially separated groups that maintain their quantum connection, allowing them to function as a single coordinated sensor. This technique reduces quantum noise and could significantly enhance precision instruments like atomic clocks and gravimeters by measuring how electromagnetic fields or gravity vary across space.