Physics

'Temporal cloaking' could bring more secure optical communications

(Phys.org) —Researchers have demonstrated a method for "temporal cloaking" of optical communications, representing a potential tool to thwart would-be eavesdroppers and improve security for telecommunications.

Researchers increase NMR/MRI sensitivity through hyperpolarization of nuclei in diamond

(Phys.org) —Today's nuclear magnetic resonance (NMR) and Magnetic Resonance Imaging (MRI) technologies, like quantum information processing and nuclear spintronic technologies, are based on an intrinsic quantum property of electrons and atomic nuclei called "spin." Electrons and nuclei can act like tiny bar magnets with a spin that is assigned a directional state of either "up" or "down." NMR/MRI signals depend upon a majority of nuclear spins being polarized to point in one direction. The greater the polarization, the stronger the signal. Researchers with the U.S.

Resistivity switch is window to role of magnetism in iron-based superconductors

Physicists have discovered surprising changes in electrical resistivity in iron-based superconductors. The findings offer further evidence that magnetism and superconductivity are closely related in this class of novel superconductors.

Yes, There is a Rat on Mars...

...and there is also a human figure, several faces, a bunny rabbit, a gun, a small chair, a large forest, and pretty much every other shape the human eye can piece together given a very large number of random shapes to contemplate. As many writers have noted, the tendency of the eye and the brain to collaborate on creating recognizable objects is a well-known psychological phenomenon known as pareidolia.

From an evolutionary point of view, pareidolia is a very useful thing. Babies are har

Increased NMR/MRI sensitivity through hyperpolarization of nuclei in diamond

Researchers have demonstrated the first magnetically-controlled nearly complete hyperpolarization of the spins of carbon-13 nuclei located near synthetic defects in diamond crystals. This spin hyperpolarization, which can be carried out with refrigerator-style magnets at room temperature, enhances NMR/MRI sensitivity by many orders of magnitude.

First observation of spin Hall effect in a quantum gas is step toward 'atomtronics'

Researchers have reported the first observation of the spin Hall effect in a Bose-Einstein condensate.

Giant planets offer help in faster research on material surfaces

New, fast and accurate algorithm from the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw, based on the mathematical formalism used to model processes accompanying interaction of light with gas planet atmospheres, is a major step towards better understanding of physical and chemical properties of materials' surfaces studied under laboratory conditions.

ITER has arrival

On Monday 3 June the first ITER load made its way from the docks in Fos-sur-Mer, near Marseille, to the ITER construction site. Its precious cargo: 14.5 tons of copper conductor manufactured in China. The 737-metre copper "dummy" will serve to qualify the tooling and manufacturing processes of ITER's large and powerful poloidal field magnets. "This is only a small load," said the head of ITER's Magnet Division Neil Mitchell, "but we expect that it is the start of an avalanche of deliveries to the ITER site now that the production around the world is building up."

Simple wavelength detector could speed data communications

(Phys.org) —Researchers at SLAC and Stanford have created a new device, smaller than a grain of rice, that could streamline optical data communications. It can directly identify the wavelength of light that hits it, and should scale down to the even tinier dimensions needed for multichannel optical data receivers on future generations of computer chips.

Ambitious project 'unifies' laser and high-energy physics

An international team of experts are developing a revolutionary laser system by investigating the use of fibre lasers in ground-breaking particle accelerator technologies, such as the Large Hadron Collider (LHC), which is considered by scientists as one of the great engineering milestones of mankind.

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