Technique could be used to create quantum-information systems

 

Molecules” made from three photons have been created by physicists in the US. The photon triplets were made by firing laser light into an atomic gas and the researchers believe that their technique could be useful for creating entangled photons for quantum-information systems.

 

 

 

In this latest experiment a team led by Vuletić and Lukin observed both pairs and triplets of photons emerging from the atomic gas, rather than the random emission of single photons that would occur if molecules were not forming. They also measured the phase of the photon pairs and triplets and found this to be consistent with an attractive interaction. Indeed, the phase measurements revealed that the photon triplets were more strongly bound than the photon pairs.

Sourced through Scoop.it from: physicsworld.com

On any given day, there could be a half dozen autonomous cars mapping the same street corner in Silicon Valley. These cars, each from a different company, are all doing the same thing: building high-definition street maps, which may eventually serve as an on-board navigation guide for driverless vehicles. 

These companies converge where the law and weather are welcoming—or where they can get the most attention. For example, a flock of mapping vehicles congregates every year in the vicinity of the CES technology trade show, a hot spot for self-driving feats. “There probably have been 50 companies that mapped Las Vegas simply to do a CES drive,” said Chris McNally, an analyst with Evercore ISI. “It’s such a waste of resources.”

Sourced through Scoop.it from: www.bloomberg.com

Earth’s global surface temperatures in 2017 ranked as the second warmest since reliable instrumental records began in 1880, according to an analysis by NASA released today. Continuing the planet’s long-term warming trend, globally averaged temperatures in 2017 were 1.62 degrees Fahrenheit (0.90 degrees Celsius) warmer than the 1951 to 1980 mean, according to scientists at NASA’s Goddard Institute for Space Studies (GISS) in New York. That is second only to global temperatures in 2016.

 

 

Sourced through Scoop.it from: blogs.ei.columbia.edu