Arrays of strontium Rydberg atoms show promise for use in quantum computersA team of researchers at California Institute of Technology has found that arrays of strontium Rydberg atoms show promise for use in a quantum computer. In their paper published in the journal Nature Physics, the researchers describe their study of quantum entangled alkaline-earth Rydberg atoms arranged in arrays and what they learned about them. In the same issue, Wenhui Li, with the National University of Singapore, has published a News & Views piece exploring the state of quantum computing research, and outlines the work done by the team at CIT.
Luca emerges from Soyuz MS-13ESA astronaut Luca Parmitano emerges from the Soyuz MS-13 spacecraft after landing in the steppes of Kazakhstan at 09:12 GMT (10:12 CET), 6 February 2020.Luca returned to Earth, after six months on the International Space Station mission, alongside US astronaut Christina Koch and Russian cosmonaut Alexander Skvortsov. This was Luca’s second mission to the Space Station and is known as...2
One-of-a-kind microscope enables breakthrough in quantum scienceTechnion Professor Ido Kaminer and his team have made a dramatic breakthrough in the field of quantum science: a quantum microscope that records the flow of light, enabling the direct observation of light trapped inside a photonic crystal.
The Teetering Towers of Abstraction | bit-playerAbstraction is an abstraction. You can’t touch it or taste it or photograph it. You can barely talk about it without resorting to metaphors and analogies. Yet this ghostly concept is an essential tool in both mathematics and computer science. Oddly, it seems to inspire quite different feelings and responses in those two fields. I’ve been wondering why. In mathematics abstraction serves as...5
Fusion in a magnetically-shielded-grid inertial electrostatic confinement deviceTheory for a gridded inertial electrostatic confinement (IEC) fusion system is presented that shows a net energy gain is possible if the grid is magnetically shielded from ion impact. A simplified grid geometry is studied, consisting of two negatively-biased coaxial current-carrying rings, oriented such that their opposing magnetic fields produce a spindle cusp. Our analysis indicates that better than break-even performance is possible even in a deuterium-deuterium system at bench-top scales. The proposed device has the unusual property that it can avoid both the cusp losses of traditional magnetic fusion systems and the grid losses of traditional IEC configurations.8
AI selecting best solar perovskitesA U.S. research team has used machine learning to optimize material composition and predict the design strategies and performance of perovskite solar cells. The researchers analyzed 2,000 peer-reviewed perovskite publications and collected more than 300 data points.3
Tesla is going to have new head of its Advanced Battery Research in CanadaIt looks like Tesla is going to have a new head of its Advanced Battery Research program in Canada, as Jeff Dahn appears to be planning a succession for his extremely successful battery lab currently sponsored by the electric automaker. Dahn is considered a pioneer in Li-ion battery cells. He has been working on the …2
Astronomers discover 30 degree arc of ultraviolet emission centered on the Big DipperAstronomers announced the discovery of a ghostly, almost perfectly circular, arc of ultraviolet emission centered on the handle of the Big Dipper and stretching 30 degrees across the Northern sky. If the arc were extended, it would completely encircle the Big Dipper with a diameter of 60 degrees.
Welcome! [The Physics Travel Guide]The Physics Travel Guide is an expository wiki which explains concepts in three levels of difficulty. We call these levels: intuitive, concrete and abstract. Try it. What do you want to understand? What is the Physics Travel Guide? It's an expository physics wiki, but also much more than...15
Shtetl-Optimized » Blog Archive » Turn down the quantum volumeSeveral people asked me to comment on the recent announcement by Honeywell that they’ll soon have what they call “the most powerful” quantum computer (see here for press release, here for Forbes article, here for paper). I’m glad that Honeywell, which many people might know as an air-conditioner manufacturer, has entered the race for trapped-ion QC. I wish them success. I’ve known...1