Category Physics

Fountain interferometer. Credit: Nature (2015). DOI: 10.1038/nature16155

Scientists entangling quantum particles and even whole atoms has been in the news a lot over the past couple of years as experiments have been conducted with the goal of attempting to better understand the strange phenomenon—and much has been learned. But, as scientists figure out how to entangle two particles at ever greater distances apart there has come questions about the size of objects that can be entangled. Schrödinger’s cat has come up in several such discussions as theorists and those in the applied fields seek to figure out if it might be truly possible to cause a whole cat to actually be in two places at once...

Ferromagnetism mediated by Sb or Te atoms. Credit: Hiroshima University

A group of researchers in Japan and China identified the requirements for the development of new types of extremely low power consumption electric devices by studying Cr-doped (Sb, Bi)2Te3 thin films.

At extremely low temperatures, an electric 3current flows around the edge of the film without energy loss, and under no external magnetic field. This attractive phenomenon is due to the material’s ferromagnetic properties. For the first time, researchers have revealed the mechanism by which this occurs. “Hopefully, this achievement will lead to the creation of novel materials that operate at room temperature in the future,” said Prof Akio Kimura.

Their achievement can be traced back to the discovery of the quantum Hall ef...

Fabrication schematic of ordered mesoporous fewlayer carbon (OMFLC). Credit: Science (2015). DOI: 10.1126/science.aab3798

Like a battery, a capacitor is able to hold a charge, unlike a battery, however, it is able to be charged and discharged very quickly—the down side to capacitors is that they cannot hold nearly as much charge/ kg as batteries. The work by the team in China is a step towards increasing the amount of charge that can be held by supercapacitors (capacitors that have much higher capacitance than standard capacitors—they generally employ carbon-based electrodes)—in this case, they report a 3X increase using their new method—noting also that that their supercapacitor was capable of storing 41 watt-hours per kilogram and could deliver 26 kilowatts per kilogram to a device...

This packaged electronic-photonic processor microchip under illumination reveals the chip’s primary features. The light rays emanating from the chip are drawn to show that the processor talks to the outside world using light. Credit: Glenn J. Asakawa, University of Colorado Read more at: http://phys.org/news/2015-12-demo-processor-ultrafast.html#jCp

Engineers have successfully married electrons and photons within a single-chip microprocessor, a landmark development that opens the door to ultrafast, low-power data crunching. The researchers packed 2 processor cores with >70 million transistors and 850 photonic components onto a 3-by-6-millimeter chip...