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Category: computing – Page 18

Solitonic superfluorescence paves way for high-temperature quantum materials

A study in Nature describes both the mechanism and the material conditions necessary for superfluorescence at room temperature. The work could serve as a blueprint for designing materials that allow exotic quantum states—such as superconductivity, superfluidity or superfluorescence—at high temperatures, paving the way for applications such as quantum computers that don’t require extremely low temperatures to operate.

The international team that did the work was led by North Carolina State University and included researchers from Duke University, Boston University and the Institut Polytechnique de Paris.

“In this work, we show both experimental and theoretical reasons behind macroscopic quantum coherence at high temperature,” says Kenan Gundogdu, professor of physics at NC State and corresponding author of the study.

Rapid nanoparticle simulations could boost efforts to combat air pollution

A pioneering method to simulate how nanoparticles move through the air could boost efforts to combat air pollution, suggests a study in the Journal of Computational Physics.

Tiny particles found in exhaust fumes, wildfire smoke and other forms of airborne pollution are linked with serious health conditions such as stroke, and cancer, but predicting how they move is notoriously difficult, researchers say.

Now, scientists have developed a new computer modeling approach that dramatically improves the accuracy and efficiency of simulating how nanoparticles behave in the air. In practice, this could mean simulations that can currently take weeks to run could be completed in a matter of hours, the team says.

University of Arizona scientists unveil breakthrough petahertz-speed transistor

A team of scientists has unveiled a breakthrough that could one day propel computers to operate at speeds millions of times faster than today’s most advanced processors.

The discovery, led by researchers at the University of Arizona and their international collaborators, centers on harnessing ultrafast pulses of light to control the movement of electrons in graphene – a material just one atom thick.

The research, recently published in Nature Communications, demonstrates that electrons can be made to bypass barriers almost instantaneously by firing laser pulses lasting less than a trillionth of a second at graphene. This phenomenon, known as quantum tunneling, has long intrigued physicists, but the team’s ability to observe and manipulate it in real time marks a significant milestone.

A new molecular model of bilayer graphene with higher semiconducting properties

Juan Casado Cordón, Professor of Physical Chemistry at the University of Malaga, considers graphene—an infinite layer of carbon atoms—as one of the greatest discoveries of the last 20 years due to its “unique properties” such as high electrical and thermal conductivity or its great flexibility and, also, resistance. Qualities that become exceptional, he explains, with a recently found evolution consisting in joining two layers of this material—bilayer graphene.

Researchers from the University of Malaga, led by Casado Cordón, and from the Complutense University, under the coordination of Professor Nazario Martín, have taken a step further and created an unprecedented molecular model of that is capable of controlling rotation, which in turn allows controlling conductivity and achieving “potentially spectacular semiconducting properties.”

The result is a new model molecule of bilayer graphene. “By designing covalently bound molecular nanographenes we can simulate the search for the magic angle between graphene-like sheets, which is where semiconductivity is achieved, a key property in, for example, the construction of transistors, the basic units of computers,” explains this scientist from the Faculty of Science. This finding has been published in Nature Chemistry.

Over 70 Malicious npm and VS Code Packages Found Stealing Data and Crypto

As many as 60 malicious npm packages have been discovered in the package registry with malicious functionality to harvest hostnames, IP addresses, DNS servers, and user directories to a Discord-controlled endpoint.

The packages, published under three different accounts, come with an install‑time script that’s triggered during npm install, Socket security researcher Kirill Boychenko said in a report published last week. The libraries have been collectively downloaded over 3,000 times.

“The script targets Windows, macOS, or Linux systems, and includes basic sandbox‑evasion checks, making every infected workstation or continuous‑integration node a potential source of valuable reconnaissance,” the software supply chain security firm said.

Nvidia in Talks to Invest in Quantum Startup PsiQuantum

Nvidia is in advanced talks to invest in PsiQuantum, a quantum computing startup, according to a person involved in the discussions. The investment would be the latest signal that Nvidia has shifted its stance on quantum computing after CEO Jensen Huang earlier this year seemed to cast doubt on…

This Explosive Plasma Discovery by a US Lab Is About to Redefine Nuclear Energy and Microchip Performance Forever

IN A NUTSHELL 🔬 PPPL’s new simulation method revolutionizes fusion research and chip manufacturing by accurately modeling plasma behaviors. 💻 The development addresses significant computational challenges, enhancing stability and efficiency in plasma simulations. ⚡ Improved simulations allow for precise conservation of energy, ensuring results reflect real-world physical processes. 🚀 Future applications include advancements in fusion