Angular momentum is a fundamental quantity in physics that describes the rotational motion of objects. In quantum physics, it ...

A research team succeeds in solving a decade-old physical puzzle: the question of the fate of angular momentum during the ultrafast demagnetization of nickel crystals by laser light.

Yet all that angular momentum cannot simply be lost. It must be conserved – somewhere. Thanks to new ultrafast electron diffraction experiments, researchers at the University of Konstanz in Germany ...

In 2008, the mathematicians Mu-Tao Wang of Columbia University and Shing-Tung Yau, now a professor at Tsinghua University in China and an emeritus professor at Harvard University, advanced a ...

The angular momentum of a spinning object will remain the same unless an outside torque acts on it. In physics when something stays the same we say it is conserved . That's where the phrase ...

First introduced nearly a century ago, the concept of spin angular momentum, or spin, is critically important in quantum physics and underpins the emerging fields of spintronics and quantum computing.

Spin is associated with optical polarization, which is the orientation of light’s electric-field oscillations. Orbital angular momentum rotates a light beam’s wavefront around its propagation axis, ...