Spin states Physicists could soon be putting the Standard Model to the test by observing transitions in a one-positron ...

A team of physicists has shown that pairs of helium atoms, chilled to near absolute zero and launched into each other, can behave as though each atom travels two separate paths at the same time. The ...

Unifying gravity and quantum theory remains a significant goal in modern physics. Despite the success in unifying all other fundamental interactions (electromagnetism, strong force and weak force) ...

Physicists have directly observed a long-predicted quantum effect of gravity, putting one of Einstein’s foundational ideas to a striking new test. Using ultracold atoms, researchers split an atom’s ...

Ask almost any physicist what the most frustrating problem is in modern-day physics, and they will likely say the discrepancy between general relativity and quantum mechanics. That discrepancy has ...

An international team of researchers has demonstrated that the equivalence principle, a cornerstone of Einstein’s theory of general relativity, holds even in the quantum world. This is a very ...