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Spin glass physics with trapped ions

Spin glass physics with trapped ions

One of the most striking discoveries of quantum information theory is the existence of problems that can be solved in a more efficient way with quantum resources than with any known classical algorithm.

Number-partitioning, which refers to the simple task of dividing a set of numbers into two groups of equal sums is, in fact, a very difficult problem to solve with classical computers.

Underwater grass beds have ability to protect and maintain their own health

Underwater grass beds have ability to protect and maintain their own health

CAMBRIDGE, MD (May 26, 2016)--An expansive bed of underwater grass at the mouth of the Susquehanna River has proven it is able to "take a licking and keep on ticking." A recent study has found that the submersed aquatic vegetation (SAV) bed at Susquehanna Flats, which only recently made a comeback in the Chesapeake Bay, was not only able to survive a barrage of rough storms and flooding, but it has proven a natural ability to protect and maintain itself.

Arctic Ocean methane does not reach the atmosphere

Arctic Ocean methane does not reach the atmosphere

250 methane flares release the climate gas methane from the seabed and into the Arctic Ocean. During the summer months this leads to an increased methane concentration in the ocean. But surprisingly, very little of the climate gas rising up through the sea reaches the atmosphere.

"Our results are exciting and controversial", says senior scientist Cathrine Lund Myhre from NILU - Norwegian Institute for Air Research, who is cooperating with CAGE through MOCA project.

The results were published in Geophysical Research Letters.

Expert urges voluntary family planning to mitigate climate change

Expert urges voluntary family planning to mitigate climate change

With climate change already close to an irreversible tipping point, urgent action is needed to reduce not only our mean (carbon) footprints but also the "number of feet" - that is, the growing population either already creating large footprints or aspiring to do so, argues a leading physician and environmentalist in The BMJ today.

Yet John Guillebaud, Emeritus Professor of Family Planning and Reproductive Health at University College London, says most climate change discussions focus only on technology and consumption.

How a huge landslide shaped Zion National Park

How a huge landslide shaped Zion National Park

SALT LAKE CITY, May 26, 2016 - A Utah mountainside collapsed 4,800 years ago in a gargantuan landslide known as a "rock avalanche," creating the flat floor of what is now Zion National Park by damming the Virgin River to create a lake that existed for 700 years.

John Innes scientists discover missing link in plant nitrogen fixation process

John Innes scientists discover missing link in plant nitrogen fixation process

Scientists at the John Innes Centre have discovered an important component in the process of nitrogen fixation in plants. They have identified a key protein that facilitates the movement of calcium in plant cells. This movement of calcium signals to the plant that nitrogen-fixing bacteria are close by and triggers the development of nodules on its roots to house these bacteria.

New survey shows that retirement includes work for many older Americans

May 10, 2016, Chicago--Departing the workforce entirely and entering retirement at age 65 is no longer a reality for many older people in the United States, according to a recent survey by The Associated Press-NORC Center for Public Affairs Research. The study finds that there are large numbers of older Americans who are currently, or who expect to be, working longer. However, this doesn't necessarily mean that they are continuing with the same employment circumstances indefinitely.

At the top of their game

Being at the top of the food chain is no guarantee of a species survival. Not only are many of these so-called apex predators susceptible to human impacts, they also are slow to recover from them, which makes these animals vulnerable despite their high-ranking ecosystem status.

Schrödinger's cat is alive and dead in 2 places at once

Through new experiments involving the famous Schrödinger cat state paradox, researchers have shown that a "quantum cat" can be both alive and dead, and in two places at once. The results, which involve inducing a large number of photons to have matching states (or to become entangled), show the ability to manipulate complex quantum states, with applications for computation and long-distance communication. They also represent perhaps the first time scientists have been able to achieve such quantum coherence at a macroscopic scale.

A look beyond the horizon of events

In principle, nothing that enters a black hole can leave the black hole. This has considerably complicated the study of these mysterious bodies on which generations of physicists have debated ever since 1916, the year their existence was hypothesized as a direct consequence of Einstein's Theory of Relativity. There is, however, some consensus in the scientific community on the fact that black holes possess an entropy, because their existence would otherwise violate the second law of thermodynamics.