Cathodoluminescence Used to Probe Metamaterials

True-colour cathodoluminescence image taken with the Cameca SX100. Fluorite (blue-violet) is shown associated with calcite (yellow-orange) in a carbonatite from India. Credit: Natural History Museum UK

The phenomenon of cathodoluminescence gave geologists an easy way to identify quartz and other minerals in rock samples. Cathodoluminescence allows a piece of quartz to glow icy blue when put under an electron scanning microscope. Now, scientists have used this phenomenon to probe into nanostructures.

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Quantum Gas Temperature Goes Below Absolute Zero

Energy distribution of atoms in a thermal state. Positive absolute temperatures above, in blue; negative absolute temperatures below, in red. Credit: LMU/MPQ Munich

Physicists have been able to create an atomic gas that can attain a temperature below absolute zero, -273.15˚C. They were able to create this gas using negative-Kelvin materials and new quantum devices.

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Cherenkov Radiation Effect in a Line of Point Charges

Cherenkov Radiation Effect in a Line of Point Charges

A newly published study suggests that the interaction between a surface and a charge packet moving parallel to it can become repulsive above a critical relativistic energy. These findings could potentially impact fundamental electrodynamics, accelerator physics and electron spectroscopy.

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Discovery of Magnetic Field That Can Flip Heat Flow

Josephson-heat-interferometer

Scientists discovered a magnetic field that can control the flow of heat from one body to another. It was first predicted 50 years ago, and its effect could someday lead to a new generation of electronic devices that use heat rather than charge to carry information.

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Higgs Duality: Contradictory Results At LHC

ATLAS-higgs-boson-CERN

The latest data presented by scientists on Higgs boson shows that separate measurements of its properties are showing two slightly different masses.

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Japan Could Host International Linear Collider

international-linear-collider-rendering

As most of the world is still dealing with the worst economic crisis in decades, Japan is currently being considered as the potential host for the International Linear Collider (ILC), a multi-billion-dollar machine that will smash atoms at higher and higher energy levels.

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As Supersymmetry Fails, Physicists Looking for New Models

LHC-tunnel-SUSY

As the Large Hadron Collider has been unable to find any of the particles suggested by supersymmetry, theoretical particle physicists are trying to change their worldview, away from supersymmetry to theories that could explain the results.

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Atomic Gas Superfluid Might Help Model the Early Cosmos

novel-superfluid

Quantum physicists have shown that superfluid gases can conduct without experiencing any resistance, possibly paving a way to help model the early Universe in the lab.

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High-Energy Physicists Set New Record for Data Transfer

high-energy-information-flow

Physicists at the California Institute of Technology have set a new record for data network data transfer speeds. The international team of high-energy physicists, computer scientists and network engineers achieved a rate of 339 gigabits per second (Gbps), which is equivalent to four million gigabytes per day, roughly doubling last year’s record.

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Experiment Using Photons Could Detect Quantum-Scale Black Holes

quantum-gravity-granularity-space

A new tabletop experiment using a single photon was proposed to show whether space-time is made up of indivisible units. Space isn’t smooth, and physicists think that on the quantum scale, it is composed of indivisible subunits, like the dots of a pointillist drawing. This pixelated landscape is thought to be populated by black holes, smaller than one trillionth of one trillionth of the diameter of a hydrogen atom, which continuously pop in and out of existence.

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