Category Physics

NIST physicists have built a quantum simulator made of trapped beryllium ions (charged atoms) that are proven to be entangled, a quantum phenomenon linking the properties of all the particles. The spinning crystal, about 1 millimeter wide, can contain anywhere from 20 to several hundred ions. Credit: NIST

Physicists at NIST have “entangled” or linked together the properties of up to 219 beryllium ions (charged atoms) to create a quantum simulator. The simulator is designed to model and mimic complex physics phenomena in a way that is impossible with conventional machines, even supercomputers. The techniques could also help improve atomic clocks.

The new NIST system can generate quantum entanglement in about 10X as many ions as any previous simulators based on ions, a scale-up that is cruci...

Masdar Institute postdoctoral researcher, Dr. Jin You Lu, characterizes the nanoporous solar absorber with UV-Vis-NIR spectroscopy. Credit: Tahra Al Hammadi, Masdar Institute News

“Our research team has developed a simple and cost-effective fabrication technique to create solar absorbers that can harness a greater share of the solar spectrum, thus increasing their efficiencies, while also maintaining low emission levels,” said Masdar Institute’s Dr. TieJun Zhang, Assistant Professor of Mechanical and Materials Engineering.

Dr. Nicholas X...

Plexcitons travel for 20,000 nanometers, a length which is on the order of the width of human hair. Graphic by Joel Yuen-Zhou

Scientists at UC SD, MIT and HarvardU have engineered “topological plexcitons,” energy-carrying particles that could help make possible the design of new kinds of solar cells and miniaturized optical circuitry. Within the Lilliputian world of solid state physics, light and matter interact in strange ways, exchanging energy back and forth between them.

“When light and matter interact, they exchange energy,” explained Assistant/Prof. Joel Yuen-Zhou. “Energy can flow back and forth between light in a metal (so called plasmon) and light in a molecule (so called exciton)...

An ORNL-led research team used neutrons (depicted as spheres) to determine the magnetic structure (seen as blue arrows) of an osmium-based material. X-rays (seen as purple waves) revealed the presence of a strong spin orbit effect (illustrated in red). Credit: ORNL/Jill Hemman

An elusive massless particle could exist in a magnetic crystal structure, revealed by neutron and X-ray research. The team studied a material containing the dense element osmium and documented 2 conditions required for the presence of Weyl fermions -predicted in 1929 and observed experimentally in 2015. Researchers are looking for other materials that could host them to harness their unique properties in spintronics and advanced computing applications such as quantum computers.

“Once you have a material that hosts th...