Unconventional quantum theories may imply that time itself has a tiny fundamental uncertainty, placing an ultimate limit on ...

A new experiment using ultracold rubidium atoms found that a quantum object in free fall behaves consistently with Einstein's equivalence principle.

Physicists have proven a 100-year-old prediction of relativity by showing that Einstein's equivalence principle holds at quantum scales.

Physicists have directly observed gravity's effect on a quantum object, supporting Einstein's theory and advancing the quest ...

Learn about a recent experiment that could take us one step closer to solving one of physics biggest questions.

Physicists have directly linked quantum mechanics and Einstein's gravity theory. An experiment used ultracold atoms in ...

Irrational numbers have underpinned quantum mechanics for a century. Removing them could eliminate its strangest features and trigger the biggest upheaval in physics since quantum theory began ...

Scientists have spotted the first hints that Einstein's formulation of gravity operates in the quantum realm.

When you throw a ball in the air, the equations of classical physics will tell you exactly what path the ball will take as it falls, and when and where it will land. But if you were to squeeze that ...