spin (physics)

A firearms channel tested how poorly rifles perform when the rifling, the spiral grooves inside a barrel that spin and stabilize bullets, is removed. The demonstration shows rounds tumbling and losing accuracy at short range, prompting discussion among shooting and physics enthusiasts about the mechanics of gyroscopic stabilization and barrel design.

Researchers at Wits University and the University of East Anglia have prepared a light beam with zero net spin that develops left- and right-handed regions as it travels through empty space, with the separation controlled by a single topological number. The work required no special materials or tight constraints, and is drawing attention as a striking demonstration of topology shaping how light behaves in free space.

Astronomers report that the fastest known star in the Milky Way is influenced by the rotation of Sagittarius A*, the supermassive black hole at the centre of our galaxy. The finding offers a rare way to measure the black hole's spin using a stellar orbit, and physicists are discussing what it reveals about gravity in the extreme environment near the galactic centre.

Nature has published work on quantum magnonics, a field that studies magnons — collective spin waves in magnetic materials — as quantum information carriers. Researchers see it as a route to linking magnetic systems with superconducting circuits and photons, potentially enabling new quantum technologies. The topic is being discussed across the physics community following the publication.

Researchers report the first laboratory observation of quantum spins shifting an object visible at the centimeter scale, a leap from the atomic and microscopic systems usually involved in such experiments. The result, covered by physics news outlets, suggests quantum mechanical effects can be harnessed to exert measurable mechanical influence on everyday-scale objects, with implications for sensing and quantum technology research.

A Nature publication traces the full evolution of spin fractionalization, a quantum phenomenon in which an electron's spin and charge degrees of freedom behave as separate excitations. Researchers have followed how this process unfolds over time, offering a more complete picture of quasiparticle dynamics in correlated quantum materials.

Researchers have released a new open-source platform that separates magnetic geometry from spin-orbit effects in unconventional magnets, a long-standing challenge in condensed matter physics. By isolating these contributions, the tool could help scientists better understand and design materials for spintronics and next-generation electronics. Details of the platform's capabilities and validation have drawn attention from the physics and materials science community.

Researchers report progress in identifying the experimental signatures of chiral spin liquids, an exotic quantum state of matter in which electron spins move without resistance and break time-reversal symmetry. Confirming these signatures would be a step toward understanding frustrated magnetism and could inform future quantum technologies that exploit topological states.