Archive for the ‘quantum physics’ category

Dec 10, 2023

Researchers show an Old Law still holds for Quirky Quantum Materials

Posted by in categories: particle physics, quantum physics

Long before researchers discovered the electron and its role in generating electrical current, they knew about electricity and were exploring its potential. One thing they learned early on was that metals were great conductors of both electricity and heat.

And in 1,853, two scientists showed that those two admirable properties of metals were somehow related: At any given temperature, the ratio of electronic conductivity to thermal conductivity was roughly the same in any metal they tested.

This so-called Wiedemann-Franz law has held ever since — except in quantum materials, where electrons stop behaving as individual particles and glom together into a sort of electron soup.

Dec 10, 2023

When do we become Cyborgs? The AI Quantum Biological Monster

Posted by in categories: biological, cyborgs, quantum physics, robotics/AI

An exploration of the merging of biology, AI and quantum computing and the spooky implications of it. My Patreon Page:

Dec 10, 2023

Rigetti Launches Novera QPU, the Company’s First Commercially Available QPU

Posted by in categories: computing, quantum physics

Rigetti announced the launch of its Novera™ QPU — a 9-qubit quantum processing unit.

Rigetti Computing announced the launch and sale of the company’s Novera™ QPU, a 9-qubit quantum processing unit.

Dec 9, 2023

The (Often) Overlooked Experiment That Revealed the Quantum World

Posted by in category: quantum physics

A century ago, the Stern-Gerlach experiment established the truth of quantum mechanics. Now it’s being used to probe the clash of quantum theory and gravity.

Dec 9, 2023

A micro-ring resonator with big potential: Hybrid device significantly improves laser technology

Posted by in categories: computing, engineering, quantum physics

The team at EPFL’s Photonic Systems Laboratory (PHOSL) has developed a chip-scale laser source that enhances the performance of semiconductor lasers while enabling the generation of shorter wavelengths.

This pioneering work, led by Professor Camille Brès and postdoctoral researcher Marco Clementi from EPFL’s School of Engineering represents a significant advance in the field of photonics, with implications for telecommunications, metrology, and other high-precision applications.

The study, published in the journal Light: Science & Applications, reveals how the PHOSL researchers, in collaboration with the Laboratory of Photonics and Quantum Measurements, have successfully integrated semiconductor lasers with silicon nitride photonic circuits containing microresonators. This integration results in a hybrid device that emits highly uniform and precise light in both near-infrared and visible ranges, filling a technological gap that has long challenged the industry.

Dec 9, 2023

Diamond quantum sensors measure neuron activity

Posted by in categories: biotech/medical, neuroscience, quantum physics

A recent study by European scientists shows that highly sensitive sensors based on color centers in a diamond can be used to record electrical activity from neurons in living brain tissue. The work is published in the journal Scientific Reports.

Before people encounter symptoms of diseases such as dementia, slight changes have usually occurred already in the . It may be that parts of the brain are swelling up or clumps of proteins are forming. These small changes might influence how in the brain signal each other and communicate, how information is processed and memorized.

Medical scientists want to study these minor changes that occur in the very early stages of a disease. That way, the intention is to learn more about the causes of the disease to provide new insights and more efficient treatments. Today, microscopic studies on the brain are performed with one of two strategies: Optical inspection of brain tissue samples from animals or deceased patients that suffer from the studied disease or measurements of the signals from the nerve cells using wires, coloring, or light.

Dec 9, 2023

A superconducting junction made from a single 2D material promises to harness strange new physics

Posted by in categories: computing, engineering, particle physics, quantum physics

Physicists at RIKEN have developed an electronic device that hosts unusual states of matter, which could one day be useful for quantum computation.

When a material exists as an ultrathin layer—a mere one or a few atoms thick—it has totally different properties from thicker samples of the same material. That’s because confining electrons to a 2D plane gives rise to exotic states. Because of their flat dimensions and their broad compatibility with existing semiconductor technologies, such 2D materials are promising for harnessing new phenomenon in .

These states include quantum spin Hall insulators, which conduct electricity along their edges but are electrically insulating in their interiors. Such systems when coupled with superconductivity have been proposed as a route toward engineering topological superconducting states that have potential application in future topological quantum computers.

Dec 7, 2023

Magnetic Revolution: Diamonds and Rust Rewrite Physics Textbooks

Posted by in categories: computing, quantum physics

Cambridge researchers have identified magnetic monopoles in hematite, suggesting new possibilities for advanced, eco-friendly computing technologies. This first-time observation of emergent monopoles in a natural magnet could unlock new avenues in quantum material research.

Researchers have discovered magnetic monopoles – isolated magnetic charges – in a material closely related to rust, a result that could be used to power greener and faster computing technologies.

Researchers led by the University of Cambridge used a technique known as diamond quantum sensing to observe swirling textures and faint magnetic signals on the surface of hematite, a type of iron oxide.

Dec 7, 2023

Breakthrough in coherent two-photon LIDAR overcomes range limitations

Posted by in categories: innovation, quantum physics

New research has unveiled an advancement in Light Detection and Ranging (LIDAR) technology, offering unparalleled sensitivity and precision in measuring the distance of remote objects.

This research, published in Physical Review Letters, is a result of a collaboration between the group of Professor Yoon-Ho Kim at POSTECH in South Korea, and the Quantum Science and Technology Hub at the University of Portsmouth.

Coherent LIDAR has long been a cornerstone in distance measurement, but its capabilities have been restrained by the time of the light source. In a pioneering move, researchers have introduced two-photon LIDAR, eliminating the range limitations imposed by coherence time, to achieve accurate and precise ranging of a remote object situated far beyond the coherence time dictated by the spectral bandwidth of the light source.

Dec 7, 2023

IBM unveils new quantum computing chip to ‘explore new frontiers of science’

Posted by in categories: particle physics, quantum physics, robotics/AI, science

Computer and AI giant rolls out machine using ‘Heron’ chips using subatomic particles instead of ones and zeros.

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