Spiral-Laser creates Quantum Whirlpool

wibleyWissenschaftler an der National University in Canberra, Australien, haben einen „Whirlpool“ aus Bose-Einstein Kondensat gebastelt. Dazu haben sie einen Laser gebaut, der spiralförmige Lichtstrahlen feuert und eine rotierende Masse aus Licht-Teilchen namens Polaritonen („hybrid particles that have properties of both matter and light“) hergestellt. In other Words: Wibbly Wobbly Timey Wimey… Stuff.

Physicists at The Australian National Univ. (ANU) have engineered a spiral laser beam and used it to create a whirlpool of hybrid light-matter particles called polaritons. […]

“The [circulating currents of polaritons called] vortices have previously only appeared randomly, and always in pairs that swirl in opposite directions,” said Robert Dall, who led the experimental part of the project. “However, by using a spiral mask to structure our laser, we create a chiral system that prefers one flow direction. Therefore we can create a single, stable vortex at will.”

These vortices are an example of quantum fluid behavior wherein the polaritons coalesce into a rare state of matter known as a Bose-Einstein condensate.

Laboratory Equipment: Laser Creates Quantum Whirlpool (via /.)
Paper: Creation of Orbital Angular Momentum States with Chiral Polaritonic Lenses

Andere Quantum-Bits, die ich grade im Feedreader markiert hatte:
NZZ: Was man von Quantencomputern erwarten darf (und was nicht) (via Swen)
The Verge: Building a globe-spanning quantum internet