Physics

Smallest pixels ever created could light up color-changing buildings

The smallest pixels yet created -- a million times smaller than those in smartphones, made by trapping particles of light under tiny rocks of gold -- could be used for new types of large-scale flexible displays, big enough to cover entire buildings.

Better microring sensors for optical applications

Tweaking the design of microring sensors enhances their sensitivity without adding more implementation complexity.

A surprising experiment opens the path to new particle manipulation methods

Researchers at Aalto University have discovered a surprising phenomenon that changes how we think about how sound can move particles. Their experiment is based on a famous experiment recognisable from high school science classrooms worldwide—the Chlandni Plate experiment, where particles move on a vibrating surface. The experiment was first performed in 1787 by Ernst Chladni, who is now known as the father of acoustics. Chladni's experiment showed that when a plate is vibrating at a certain frequency, heavy particles move towards the regions with less vibration, called nodal lines.

What happens when a raindrop hits a puddle?

Have you ever taken a walk through the rain on a warm spring day and seen that perfect puddle? You know, the one where the raindrops seem to touch down at just the right pace, causing a dance of vanishing circles?

A mathematical method for calculating black-hole properties from gravitational-wave data

Sean McWilliams, an assistant professor at West Virginia University, has developed a mathematical method for calculating black hole properties from gravitational wave data. He has written a paper describing his method and posted it on the arXiv preprint server. The paper has been accepted for publication in Physical Review Letters.

Computing faster with quasi-particles

Researchers have made an important step on the road to topological quantum computers.

'Fire streaks' ever more real in the collisions of atomic nuclei and protons

Collisions of lead nuclei take place under extreme physical conditions. Their course can be described using a model which assumes that the transforming, extremely hot matter—the quark-gluon plasma—flows in the form of hundreds of streaks. Until now, the "fire streaks" seemed to be purely theoretical structures. However, the latest analysis of collisions of individual protons reinforces the hypothesis that they represent a real physical phenomenon.

Substrate defects key to growth of 2D materials

Creating two-dimentional materials large enough to use in electronics is a challenge despite huge effort but now, researchers have discovered a method for improving the quality of one class of 2D materials, with potential to achieve wafer-scale growth in the future.

A new filter to better map the dark universe

The earliest known light in our universe, known as the cosmic microwave background, was emitted about 380,000 years after the Big Bang. The patterning of this relic light holds many important clues to the development and distribution of large-scale structures such as galaxies and galaxy clusters.

Great chocolate is a complex mix of science, physicists reveal

The science of what makes good chocolate has been revealed by researchers studying a 140-year-old mixing technique.

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