Physics

Physicists decipher social cohesion issues

Migrations happen for a reason, not randomly. A new study, based on computer simulation, attempts to explain the effect of so-called directional migration – migration for a reason – on cooperative behaviours and social cohesion. These results appear in a study about to be published in European Physical Journal B by Hongyan Cheng from Beijing University of Posts and Telecommunications and colleagues.

New Technique May Help Find Galaxy's 100 Billion Earth-Like Planets

Finding Earth-like planets is hard. For years, astronomers searching for worlds beyond our solar system found mostly gas giants like Jupiter, since those are bigger and easier to detect, even though smaller planets might actually be more common. But a paper in the Monthly Notices of the Royal Astronomical Society suggests a new way of looking for exoplanets may help find the estimated 100 billion Earth-like planets in the Milky Way.

The new technique, which is actually just an improvement

Search for dark matter: Experiment measures antimatter excess in cosmic ray flux

The international team running the Alpha Magnetic Spectrometer (AMS) today announced the first results in its search for dark matter. They report the observation of an excess of positrons in the cosmic ray flux. The results are consistent with the positrons originating from the annihilation of dark matter particles in space, but not yet sufficiently conclusive to rule out other explanations.

Building quantum states with individual silicon atoms

By introducing individual silicon atom 'defects' using a scanning tunneling microscope, scientists have coupled single atoms to form quantum states.

Sonic lasso catches cells

(Phys.org) —Academics have demonstrated for the first time that a "sonic lasso" can be used to grip microscopic objects, such as cells, and move them about.

Light tsunami in a superconductor

Superconductors are materials which conduct electric currents without any resistance. Scientists have managed to selectively influence this resistance-free conductivity with a powerful terahertz laser. This very precise laser light turns into a vortex which moves through the superconductor like a tsunami.

Quantum cryptography: On wings of light

Physicists have, for the first time, successfully transmitted a secure quantum code through the atmosphere from an aircraft to a ground station.

NASA Invests in Small Business Innovative Research and Technology Proposals to Enable Future Missions

NASA has selected 295 research and technology proposals from 216 American small businesses for negotiations that may lead to contract awards worth a combined $38.7 million.

NASA Administrator Statement on Alpha Magnetic Spectrometer

The following is a statement from NASA Administrator Charles Bolden on the first Alpha Magnetic Spectrometer (AMS) results announced Wednesday at the European Organization for Nuclear Research (CERN) in Switzerland. AMS is a cosmic ray particle physics detector on the exterior of the International Space Station.

NASA Flies Radar South on Wide-Ranging Scientific Expedition

A versatile NASA airborne imaging radar system is showcasing its broad scientific prowess for studying our home planet during a month-long expedition over the Americas.

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