Scientists made gravity act on an atom in a quantum superposition — the surprising result could bring Einstein’s theory and quantum physics closer together

Physicists have directly linked quantum mechanics and Einstein's gravity theory. An experiment used ultracold atoms in quantum superposition to test gravity. One atom part fell while another remained stationary, confirming a key principle. This result shows Einstein's equivalence principle holds for quantum objects. The study provides a rare experimental connection between these two physics worlds.

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