Physics

Shifting away from coal is key to cutting greenhouse gas emissions

The United States could fulfill its greenhouse gas emission pledge under the Paris Climate Agreement by virtually eliminating coal as an energy source by 2024, according to new research.

When semiconductors stick together, materials go quantum

Researchers have developed a simple method that could turn ordinary semiconducting materials into quantum machines -- superthin devices marked by extraordinary electronic behavior that could help to revolutionize a number of industries aiming for energy-efficient electronic systems -- and provide a platform for exotic new physics.

ATLAS releases first result using full LHC Run 2 dataset

The Large Hadron Collider (LHC) is currently shut down for a major two-year upgrade programme. However, LHC researchers are busy analysing the large dataset they have collected during the machine's second run (Run 2), which took place between 2015 and 2018. The ATLAS collaboration at CERN has now released its very first result based on this dataset. The result sets bounds on so-called grand unified theories, which might fill important gaps in the Standard Model of particle physics.

Researchers develop 'acoustic metamaterial' that cancels sound

Boston University researchers, Xin Zhang, a professor at the College of Engineering, and Reza Ghaffarivardavagh, a Ph.D. student in the Department of Mechanical Engineering, released a paper in Physical Review B demonstrating it's possible to silence noise using an open, ringlike structure, created to mathematically perfect specifications, for cutting out sounds while maintaining airflow.

Special surface manipulation forces dropped liquids to spiral when they rebound

A team of researchers affiliated with several institutions in China has found a way to force liquid drops to spiral as they rebound after landing on a manipulated surface. In their paper published in the journal Nature Communications, the group describes how their method works and possible applications.

1 + 1 does not equal 2 for graphene-like 2D materials

Physicists have discovered that when two atomically thin graphene-like materials are placed on top of each other their properties change, and a material with novel hybrid properties emerges, paving the way for design of new materials and nano-devices.

Can entangled qubits be used to probe black holes?

Information escapes from black holes via Hawking radiation, so it should be possible to capture it and use it to reconstruct what fell in: if given time longer than the age of the universe. However, if information is scrambled rapidly when it falls in, it may be possible to resurrect it by capturing Hawking radiation from entangled qubits. Physicists confirmed scrambling in a quantum computer, based on predictions by theorists.

Spin devices rev up

Electric currents drive all our electronic devices. The emerging field of spintronics looks to replace electric currents with what are known as spin currents. Researchers from the University of Tokyo have made a breakthrough in this area. Their discovery of the magnetic spin Hall effect could lead to low-power, high-speed and high-capacity devices. They have created sample devices which can further research into potential applications.

Download the Big Bang on your smartphone

Experience the 13.8-billion-year-old story of the universe in just seven minutes with CERN's new Big Bang app. Launched today at the Google Arts and Culture event in Washington D.C., the app, free and available for download, uses augmented or mixed reality to create an immersive adventure to our origin.

Einstein 'puzzle' solved as missing page emerges in new trove

An Albert Einstein "puzzle" has been solved thanks to a missing manuscript page emerging in a trove of his writings newly acquired by Jerusalem's Hebrew University, officials announced Wednesday.

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