An international group of physicists has traced the origin of an electromagnetic interaction to the Dirac equation, a fundamental equation of quantum physics. The interaction couples the spin of the ...

Observing the effects of special relativity doesn't necessarily require objects moving at a significant fraction of the speed ...

This course introduces the quantum mechanical concept of angular momentum operator and its relationship with rotation operator. It then presents the angular momentum operators, their eigenvalues and ...

It is like jumping on and off a carousel: what happens to neutrons changing from a non-rotating frame of reference into a rotating frame of reference -- and back? 30 years ago, scientists predicted ...

In a new study published in Nature Physics, scientists have achieved the first experimental observation of phonon angular momentum in chiral crystals. Subscribe to our newsletter for the latest ...