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Quantum computers, which can solve several complex problems exponentially faster than classical computers, are expected to improve artificial intelligence (AI) applications deployed in devices like autonomous vehicles; however, just like their predecessors, quantum computers are vulnerable to adversarial attacks.

A team of University of Texas at Dallas researchers and an industry collaborator have developed an approach to give quantum computers an extra layer of protection against such attacks. Their solution, Quantum Noise Injection for Adversarial Defense (QNAD), counteracts the impact of attacks designed to disrupt inference—AI’s ability to make decisions or solve tasks.

The team will present research that demonstrates the method at the IEEE International Symposium on Hardware Oriented Security and Trust held May 6–9 in Washington, D.C.

Lotus has revealed a rival to the Tesla Model S Plaid and Porsche Taycan Turbo S.

The next generation of wireless communication not only requires greater bandwidth at higher frequencies – it also needs a little extra time.

Cornell researchers have developed a semiconductor chip that adds a necessary time delay so signals sent across multiple arrays can align at a single point in space, and without disintegrating. The approach will enable ever-smaller devices to operate at the higher frequencies needed for future 6G communication technology.

Continue reading “3D reflectors help boost data rate in wireless communications” »

A new leak suggests Apple’s only foldable with a development schedule and release is a 20.3-inch MacBook that would enter mass production in 2027.

Apple’s first foldable could be a MacBook instead of an iPad or iPhone. Save your jokes — we already know the MacBook folds shut with hinges.

A post on X from Ming-Chi Kuo states that rumors around Apple mass producing a foldable iPhone or iPad by 2026 are not accurate. Instead, Apple’s only foldable with a development scheduled is a 20.3-inch MacBook due in 2027.

Superconducting circuits, which conduct electricity without resistance, are among the most promising technologies for quantum computing and ultrafast logic circuits. However, finding a practical way to work with these materials that require extremely cold temperatures has been a challenge.

In a step toward that goal, a team of researchers led by Prof. Hong Tang developed and successfully demonstrated a device that presents a viable solution in transferring a very weak signal from a computing device stored at cryogenic temperatures to room temperature electronics to achieve a fast data transfer with very low energy consumption. The results are published in Nature Photonics.

The practical use of superconducting circuits requires connecting them to room temperature electronics. But doing so has largely relied on coaxial cables, which have a limited bandwidth and limited thermal conductivity – two factors that negate the benefits of superconducting circuits.

Original Article from The New England Journal of Medicine — Cognition and Memory after Covid-19 in a Large Community Sample.

The thermal hall effect (THE) is a physical phenomenon characterized by tiny transverse temperature differences occurring in a material when a thermal current passes through it and a perpendicular magnetic field is applied to it. This effect has been observed in a growing number of insulators, yet its underlying physics remains poorly understood.

Researchers at Université de Sherbrooke in Canada have been trying to identify the mechanism behind this effect in different materials. Their most recent paper, published in Nature Physics, specifically examined this effect in the antiferromagnetic insulator strontium iridium oxide (Sr₂IrO₄).

“Our current research activity on the THE in insulators started with our discovery of a large THE in cuprate superconductors,” Louis Taillefer, co-author of the paper, told Phys.org.

Playing a different soundtrack is, physically speaking, only a minute change of the vibration spectrum, yet its impact on a dance floor is dramatic. People long for this tiny trigger, and as a salsa changes to a tango completely different collective patterns emerge.

Electrons in metals tend to show only one behavior at zero temperature, when all kinetic energy is quenched. One needs to frustrate the electronic interaction to break the dominance of one particular electronic order and allow multiple possible configurations. Recent results published in Nature Physics on kagome nets suggest that this triangular lattice is quite effective at doing so.

Named after the Japanese bamboo-basket woven pattern, a two-dimensional (2D) kagome lattice is constructed by a series of corner-sharing triangles. When each corner is occupied with magnetic moments with antiferromagnetic correlations, the nearest-neighbor interactions favor anti-aligned spins.

A research team from the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) and the University of Salerno in Italy has discovered that thin films of elemental bismuth exhibit the so-called non-linear Hall effect, which could be applied in technologies for the controlled use of terahertz high-frequency signals on electronic chips.

Bismuth combines several advantageous properties not found in other systems to date, as the team reports in Nature Electronics. In particular, the quantum effect is observed at room temperature. The thin-layer films can be applied even on plastic substrates and could therefore be suitable for modern high-frequency technology applications.

“When we apply a current to certain materials, they can generate a voltage perpendicular to it. We physicists call this phenomenon the Hall effect, which is actually a unifying term for effects with the same impact, but which differ in the underlying mechanisms at the electron level. Typically, the Hall voltage registered is linearly dependent on the applied current,” says Dr. Denys Makarov from the Institute of Ion Beam Physics and Materials Research at HZDR.