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Category: computing

‘Poor man’s Majoranas’ can be used as quantum spin probes

A Majorana fermion is a particle that would be identical to its antiparticle. Such an object has not yet been found. However, certain solid materials exhibit analogous behavior as if Majorana fermions were present through collective excitations of the system called quasiparticles.

In addition to generating interest in basic science as key components for understanding the material world, Majorana fermions have primarily been studied due to their potential technological applications in areas such as fault-tolerant quantum computing.

The main theoretical model used in this study is the Kitaev wire. It is a one-dimensional superconducting chain formed by electrons or collective excitations. Under certain conditions, it generates an isolated Majorana fermion at each end without altering the total energy of the system.

The depths of Neptune and Uranus may be ‘superionic’

The interiors of ice giant planets like Uranus and Neptune could be home to a previously unknown state of matter, according to new computational simulations by Carnegie’s Cong Liu and Ronald Cohen. Their work, published in Nature Communications, predicts that a quasi-one-dimensional superionic state of carbon hydride exists under the extreme pressures and temperatures found deep inside these outer solar system bodies.

More than 6,000 exoplanets have been discovered. As this number grows, astronomers, planetary scientists, and Earth scientists are crossing disciplinary boundaries—combining observation, experimentation, and theory—to define and probe the factors that help us understand the dynamic processes that shape them, including the generation of magnetic fields.

As such, interest has grown in understanding the processes that are occurring deep beneath the surfaces of planets and moons in our own solar system, which can inform our understanding of planetary dynamics, and even planetary habitability in more-distant neighborhoods.

Experiment Makes Something Move at 104% of Speed of Light! The Darkness Inside

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Hello and welcome! My name is Anton and in this video, we will talk about an experiment that makes something move faster than light — the dark holes inside the light waves
Links:
https://www.nature.com/articles/s4158… https://arxiv.org/pdf/2509.17675
Amaterasu particle: • Amaterasu Particle That Broke Physics Has…
#science #physics #speedoflight.

0:00 Challenging the fundamental rule about the speed of light
1:00 Why FTL should be impossible
2:50 New research — optical vortices (dark holes)
4:40 Breakthrough experiment and what was achieved
5:55 Main discoveries
6:30 No physics are broken
7:18 Why this matters
8:30 Physical applications?
9:30 Conclusions
10:00 What’s next?

Enjoy and please subscribe.

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Superconductivity that shouldn’t exist: Physicists dissect the mind-boggling properties of a strange quantum material

The material UTe2 exhibits multiple forms of zero electrical resistance—a phenomenon known as superconductivity—and displays several puzzling properties. After UTe2 loses its superconductivity at a certain magnetic field, it becomes superconducting again under much higher fields.

Using a new high-field measurement technique, researchers from the Institute of Science and Technology Austria (ISTA) have explained this unusual superconducting behavior in a paper in Nature Communications. Their method is now being adopted at high-field laboratories worldwide.

Quantum materials exhibit exotic properties that make them relevant for next-generation technologies. While some scientists researching quantum materials seek to uncover specific properties for targeted applications, such as quantum computing, other researchers are curiosity-driven, searching for knowledge that hasn’t yet appeared in textbooks.

How a free flow of information can amplify incorrect ideas

The idea that information should flow freely is deeply embedded in the design of social media. The assumption is that the more information is produced and shared, the better. However, simulations by a team of scientists including University of Groningen Professor of Artificial Intelligence Davide Grossi show that such an unrestricted flow of information can amplify incorrect ideas among like-minded people. The study is published in Proceedings of the National Academy of Sciences.

Information sharing is always beneficial. That is the central premise of digital communication platforms. If users want to communicate with one another, no amount of shared information is too much. But is this central premise correct? A team of social scientists and computer scientists used digital agents that shared unlimited information with perfect honesty to study how this affected the development of correct and incorrect ideas.

A mechanical blue LED: Stretching GaN shifts light from UV to blue without changing chemistry

A research team from the Faculty of Engineering at the University of Hong Kong (HKU) has successfully used mechanical stretching technology to dynamically control the emission color of gallium nitride (GaN) material from ultraviolet (UV) to blue light. This technological breakthrough provides a new semiconductor material control solution for future advanced power transistors, optoelectronic components, radio frequency components, and micro-LED displays.

The findings have been published in Physical Review X in a paper titled “Deep Elastic Strain Engineering of Free-Standing GaN Microbridge.”

Led by Professor Yang Lu from the Department of Mechanical Engineering, the team utilized micro-nano processing technology to fabricate single-crystalline GaN material into tiny bridge-like structures.

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