Superfluid helium has produced a narrow muonium beam, opening a path to test whether exotic particles fall like ordinary ...

The Pauli exclusion principle is a cornerstone of the Standard Model of particle physics and is essential for the structure and stability of matter. Now an international collaboration of physicists ...

A research team in Germany has achieved a stunning theoretical breakthrough that could reshape one of physics’ oldest foundations after demonstrating that the no longer holds true for objects on the ...

Atomic, molecular and optical (AMO) physics explores the quantum behaviour of electrons, atoms and light, and their mutual interactions across energy, length and time scales. In atoms and molecules, ...

Nuclear and plasma physics together probe matter under extreme conditions, from the sub-atomic forces that bind protons and neutrons into nuclei, to the collective behaviour of fully ionised gases in ...

The world keeps time with the ticks of atomic clocks, but a new type of clock under development—a nuclear clock—could revolutionize how we measure time and probe fundamental physics. An international ...

Researchers have designed and demonstrated an ultraviolet laser that removes a major bottleneck in the development of a nuclear clock. Whereas ordinary atomic clocks keep time using transitions of ...