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Neutrons revive Heisenberg's first take on uncertainty
Physics World    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Physicists in Austria and Japan are the first to measure two physical quantities that were used in 1927 by Werner Heisenberg in an early formulation of quantum mechanics – but then abandoned because the terms did not seem to agree with the rapidly-evolving theory. The neutron experiment verifies a 2003 reformulation of Heisenberg's famous uncertainty principle that reintroduces the concepts of error and disturbance. More

Nanotube bundles could boost solar cells
Physics World    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Thin-film solar cells could be made far more efficient with the addition of bundles of carbon nanotubes. So say researchers at the Los Alamos National Laboratory, who have shown that the bundles can be used to adeptly perform the two important steps for generating an electric current. It is first time this has been demonstrated in a single thin-film photovoltaic material. Read the associated APS Physics Focus story. More

Electron freedom could spark new computing
ABC Science    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A new kind of quantum computing could now be possible given the latest discovery about the way electrons interact, according to a paper published this week in the journal Physical Review Letters. Read the abstract of the forthcoming Physical Review Letters article here. More

Early supermassive black holes could grow it alone
Physics World    Share    Share on FacebookTwitterShare on LinkedinE-mail article
Astronomers know that supermassive black holes at the centers of galaxies existed in the early universe, but how these objects managed to accumulate such heft in a short cosmological timespan is a mystery. Now, a team of researchers in Germany and the U.S. has used a humongous computer simulation to show that cold streams of gas from outside a young galaxy could have fed its central black hole fast enough for the hole to grow rapidly. More

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Catching a gravity wave: Canceled laser space antenna may still fly
Scientific American    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The ambitious Laser Interferometer Space Antenna, a casualty of tightening budgets, could rise again. More

Planes expected to reroute following massive solar eruption
Fox News    Share    Share on FacebookTwitterShare on LinkedinE-mail article
An immense blast of plasma spewed from the sun led to the strongest radiation storm bombarding our planet since 2005, and a rare warning from the National Oceanic and Atmospheric Agency - and even a plan to redirect certain high-flying airplanes. More

Weaker sun will not delay global warming
Reuters    Share    Share on FacebookTwitterShare on LinkedinE-mail article
A weaker sun over the next 90 years is not likely to significantly delay a rise in global temperature caused by greenhouse gases, a report said. The study, by Britain's Meteorological Office and the university of Reading, found that the Sun's output would decrease up until 2100 but this would only lead to a fall in global temperatures of 0.08 degrees Celsius. More

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Physicists hope to catch neutrons in the act of jumping from our universe to another
Popular Science    Share    Share on FacebookTwitterShare on LinkedinE-mail article
The notion of multiple universes is one that cosmologists like to theorize about but generally don't relish proving, mainly because doing so would be very difficult. But a team of researchers that showed a few years ago how matter might travel between our universe and others now think they ought to be able to observe this phenomenon in action using existing technology, lending credence to the multiverse theory. All they need is a neutron bottle, some neutrons, and a year. More

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APS Weekly NewsBrief
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