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Computer vision researchers have uncovered a world of visual signals hiding in our midst, including subtle motions that betray what’s being said and faint images of what’s around a corner.

When it comes to fundamental physics, things can get spooky. At least that’s what Albert Einstein said when describing the phenomenon of quantum entanglement—the linkage of particles in such a way that measurements performed on one particle seem to affect the other, even when separated by great distances. “Spooky action at a distance” is how Einstein described what he couldn’t explain.

While quantum mechanics includes many mysterious phenomena like entanglement, it remains the best fundamental physical theory describing how matter and light behave at the smallest scales. Quantum theory has survived numerous experimental tests in the past century while enabling many advanced technologies: modern computers, digital cameras and the displays of TVs, laptops and smartphones. Quantum entanglement itself is also the key to several next-generation technologies in computing, encryption and telecommunications. Yet, there is no clear consensus on how to interpret what quantum theory says about the true nature of reality at the subatomic level, or to definitively explain how entanglement actually works.

According to Andrew Friedman, a research scientist at the University of California San Diego Center for Astrophysics and Space Sciences (CASS), “the race is on” around the globe to identify and experimentally close potential loopholes that could still allow alternative theories, distinct from quantum theory, to explain perplexing phenomena like quantum entanglement. Such loopholes could potentially allow future quantum encryption schemes to be hacked. So, Friedman and his fellow researchers conducted a “Cosmic Bell” test with polarization-entangled photons designed to further close the “freedom-of-choice” or “free will” loophole in tests of Bell’s inequality, a famous theoretical result derived by physicist John S. Bell in the 1960s. Published in the Aug. 20 issue of Physical Review Letters, their findings are consistent with quantum theory and push back to at least 7.

Continue reading “Physicists race to demystify Einstein’s ‘spooky’ science” »

The ALMA telescope in Chile has transformed how we see the universe, showing us otherwise invisible parts of the cosmos. This array of incredibly precise antennas studies a comparatively high-frequency sliver of radio light: waves that range from a few tenths of a millimeter to several millimeters in length. Recently, scientists pushed ALMA to its limits, harnessing the array’s highest-frequency (shortest wavelength) capabilities, which peer into a part of the electromagnetic spectrum that straddles the line between infrared light and radio waves.

“High-frequency radio observations like these are normally not possible from the ground,” said Brett McGuire, a chemist at the National Radio Astronomy Observatory in Charlottesville, Virginia, and lead author on a paper appearing in the Astrophysical Journal Letters. “They require the extreme precision and sensitivity of ALMA, along with some of the driest and most stable atmospheric conditions that can be found on Earth.”

Under ideal atmospheric conditions, which occurred on the evening of 5 April 2018, astronomers trained ALMA’s highest-frequency, submillimeter vision on a curious region of the Cat’s Paw Nebula (also known as NGC 6334I), a star-forming complex located about 4,300 light-years from Earth in the direction of the southern constellation Scorpius.

Continue reading “First science with ALMA’s highest-frequency capabilities” »

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Historically, water managers throughout the thirsty state of California have relied on hydrology and water engineering—both technical necessities—as well as existing drought and flood patterns to plan for future water needs.

Now, climate change is projected to shift water supplies as winters become warmer, spring snowmelt arrives earlier, and extreme weather-related events increase. Some water utilities have started to consider these risks in their management, but many do not. Lack of climate change adaptation among water utilities can put water supplies and the people dependent on them at risk, especially in marginalized communities, a new University of California, Davis, paper suggests.

The paper, which analyzes various approaches to climate science by drinking water utility managers in California, was presented along with new research at the American Sociology Association Conference in Philadelphia on Aug. 11. The paper, “Climate Information? Embedding Climate Futures within Social Temporalities of California Water Management,” was published this spring in the journal Environmental Sociology.

WASHINGTON – U.S. Reps. Lamar Smith (R-Texas) and Eddie Bernice Johnson (D-Texas), who serve as the chairman and ranking member of the House Committee on Science, Space, and Technology, and U.Sens. John Thune (R-S.D.) and Bill Nelson (D-Fla.), who serve as the chairman and ranking member of the Senate Committee on Commerce, Science, and Transportation, today announced the introduction of House and Senate companions of the National Quantum Initiative Act. The legislation would accelerate and coordinate public and private quantum science research, standards, and workforce development to give the United States a competitive advantage as China and Europe vie to achieve technological breakthroughs in this field.

Chairman Smith: “The National Quantum Initiative Act will accelerate the development of quantum information science in the United States and secure our leadership in the quantum sector. As other nations are rapidly developing their own quantum programs, the U.S. faces the risk of falling behind. This legislation provides a path forward to ensure that the U.S. secures its influence in the next generation of science and technology. I am glad that Senator John Thune has joined me in introducing this legislation, along with our respective Ranking Democrat Committee Members Rep. Eddie Bernice Johnson and Senator Bill Nelson.

”The bill creates a 10-year federal program that will significantly develop our quantum knowledge. It will bring a whole of government approach to advance QIS to the next level of research and development, while also creating public-private partnerships, leveraging the resources and expertise of government, industry and academia. Through new research facilities and a strong workforce pipeline, students and researchers will have greater resources and opportunities to develop their quantum skills and create the next great computing innovation. There is no doubt quantum technology will revolutionize our world to come. This bill secures American leadership in quantum science and guarantees a first place finish in the great quantum race.”

His nominee, Kelvin Droegemeier, is an accomplished meteorologist who studies storms and other extreme weather.

Astrophysicist Neil deGrasse Tyson says lawmakers and the media cherry pick scientific papers to reinforce political ideals on climate change and says it’s irresponsible to create public policy while ignoring the scientific community’s consensus.