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Publié le mercredi 5 juillet 2023

⇒ https://phys.org/physics-news/

Articles syndiqués tirés de ce site

Simulating particle creation in an expanding universe using quantum computers
7 février
A new study published in Scientific Reports simulates particle creation in an expanding universe using IBM quantum computers, demonstrating the digital quantum simulation of quantum field theory for curved spacetime (QFTCS).
International collaboration sheds new light on the relationship between quantum theory and thermodynamics
7 février
Researchers from Nagoya University in Japan and the Slovak Academy of Sciences have unveiled new insights into the interplay between quantum theory and thermodynamics. The team demonstrated that while quantum theory does not inherently forbid violations of the second law of thermodynamics, (…)
Scientists achieve optical control of phase and group velocities in everyday liquids
7 février
The phase and the group velocity of light propagating in conventional optical media cannot exceed the speed of light in vacuum. However, in so-called epsilon-near-zero (ENZ) materials, light exhibits an infinite phase velocity and a vanishing group velocity for a particular color (frequency).
Neutron scattering uncovers spiral magnetic structure in layered perovskites
6 février
Multiferroic materials, in which electric and magnetic properties are combined in promising ways, will be the heart of new solutions for data storage, data transmission, and quantum computers. Meanwhile, understanding the origin of such properties at a fundamental level is key for developing (…)
Study reveals how swimming speed alters foot vortex dynamics
6 février
When humans kick swim through water, vortices form around their legs, generating the force that propels them forward. However, the mechanisms underlying variations in the structure of these vortices with swimming speed remain unclear.
New AI hardware on the horizon thanks to electrically programmable spintronic device
6 février
AI transformational impact is well under way. But as AI technologies develop, so too does their power consumption. Further advancements will require AI chips that can process AI calculations with high energy efficiency. This is where spintronic devices enter the equation. Their integrated memory (…)
Making an invisible electric wire : Guiding electricity with sound
6 février
Electric sparks are used for welding, powering electronics, killing germs or for igniting the fuel in some car engines. Despite their usefulness, they are hard to control in open space—they split into chaotic branches that tend to go toward the closest metallic objects.
Advance in opto-magnetic technology leads to five-fold increase in torque efficiency
6 février
Researchers at Tohoku University have achieved a significant advancement in opto-magnetic technology, observing an opto-magnetic torque approximately five times more efficient than in conventional magnets. This breakthrough, led by Koki Nukui, Assistant Professor Satoshi Iihama, and Professor (…)
Quantum simulator combines digital and analog modes to calculate physical processes with unprecedented precision
6 février
How does cold milk disperse when it is dripped into hot coffee ? Even the fastest supercomputers are unable to perform the necessary calculations with high precision because the underlying quantum physical processes are extremely complex.
Single-photon LiDAR delivers detailed 3D images at distances up to 1 kilometer
6 février
Researchers have designed a single-photon time-of-flight LiDAR system that can acquire a high-resolution 3D image of an object or scene up to 1 kilometer away. The new system could help enhance security, monitoring, and remote sensing by enabling detailed imaging even in challenging (…)
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