БЛОГ

Archive for the ‘particle physics’ category: Page 327

Feb 26, 2020

Study identifies a transition in the strong nuclear force that illuminates the structure of a neutron star’s core

Posted by in category: particle physics

Most ordinary matter is held together by an invisible subatomic glue known as the strong nuclear force—one of the four fundamental forces in nature, along with gravity, electromagnetism, and the weak force. The strong nuclear force is responsible for the push and pull between protons and neutrons in an atom’s nucleus, which keeps an atom from collapsing in on itself.

In atomic nuclei, most protons and neutrons are far enough apart that physicists can accurately predict their interactions. However, these predictions are challenged when the subatomic particles are so close as to be practically on top of each other.

While such ultrashort-distance interactions are rare in most matter on Earth, they define the cores of neutron stars and other extremely dense astrophysical objects. Since scientists first began exploring nuclear physics, they have struggled to explain how the strong nuclear force plays out at such ultrashort distances.

Feb 25, 2020

New fusion tech utilizes lasers to bypass sun-like temps and get rid of nuclear waste

Posted by in categories: nuclear energy, particle physics

You know what this world needs now… aside from love, sweet love, of course? Less nuclear waste. But it also seemingly needs more and more power, which nuclear would be great at providing, if not for all that pesky waste and those darn radioactive meltdowns that can happen when you go around splitting atoms (fission). Which is where nuclear fusion was supposed to help out, but generating Sun-like temperatures to recreate the processes that power our Earth-powering star have kept that technology at bay.

Well, we may be a lot closer to utilizing the power of fusion, thanks to the revolutionary thinking of HB11, a company that recently secured patents in the U.S., Japan, and China for just that kind of forward thinking technology. And if all goes according to plan, it could just change the world of electricity generation as we know it.

Feb 25, 2020

Cooling of a trapped ion to the quantum regime

Posted by in categories: particle physics, quantum physics

Neutral atoms and charged ions can be cooled down to extremely low temperatures (i.e., to microkelvins, 1 millionth of a degree above absolute zero) using laser techniques. At these low temperatures, the particles have often been found to behave in accordance with the laws of quantum mechanics.

Researchers have been conducting laser cooling experiments on and ions for decades now. So far, however, no study had observed mixtures of both atoms and ions at extremely low temperatures.

Researchers at the University of Amsterdam were the first to achieve this by placing an ion inside a cloud of lithium atoms pre-cooled to a few millionths of a kelvin. Their observations, published in Nature Physics, unveiled numerous effects that could have interesting implications for the development of new quantum technologies.

Feb 25, 2020

Physicists Foretell Quantum Computer With Single-Atom Transistor

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

Physicists at Purdue University and the University of New South Wales have built a transistor from a single atom of phosphorous precisely placed on a bed of silicon, taking another step towards the holy grail of tech research: the quantum computer.

Revealed on Sunday in the academic journal Nature Nanotechnology, the research is part of a decade-long effort at the University of New South Wales to deliver a quantum computer – a machine that would use the seemingly magical properties of very small particles to instantly perform calculations beyond the scope of today’s classical computers.

Continue reading “Physicists Foretell Quantum Computer With Single-Atom Transistor” »

Feb 25, 2020

Mysterious ‘antihydrogen’ particles reveal uncanny quantum effect

Posted by in categories: particle physics, quantum physics

The bubbling, raucous quantum vacuum distorts the shape of every hydrogen atom in the universe, and it distorts antimatter “antihydrogen” too.

Feb 24, 2020

The combination of plant-based particles and water forms an ‘eco’ super-glue

Posted by in category: particle physics

Plant-based cellulose nanocrystals have remarkable inherent properties, and when combined with water, a powerful adhesive is formed that competes in strength with Superglue, without the need for toxic solvents.

Feb 24, 2020

Berkeley Lab to Tackle Particle Physics with Quantum Computing

Posted by in categories: computing, information science, particle physics, quantum physics

Massive-scale particle physics produces correspondingly large amounts of data – and this is particularly true of the Large Hadron Collider (LHC), the world’s largest particle accelerator, which is housed at the European Organization for Nuclear Research (CERN) in Switzerland. In 2026, the LHC will receive a massive upgrade through the High Luminosity LHC (HL-LHC) Project. This will increase the LHC’s data output by five to seven times – billions of particle events every second – and researchers are scrambling to prepare big data computing for this deluge of particle physics data. Now, researchers at Lawrence Berkeley National Laboratory are working to tackle high volumes of particle physics data with quantum computing.

When a particle accelerator runs, particle detectors offer data points for where particles crossed certain thresholds in the accelerator. Researchers then attempt to reconstruct precisely how the particles traveled through the accelerator, typically using some form of computer-aided pattern recognition.

This project, which is led by Heather Gray, a professor at the University of California, Berkeley, and a particle physicist at Berkeley Lab, is called Quantum Pattern Recognition for High-Energy Physics (or HEP.QPR). In essence, HEP.QPR aims to use quantum computing to speed this pattern recognition process. HEP.QPR also includes Berkeley Lab scientists Wahid Bhimji, Paolo Calafiura and Wim Lavrijsen.

Feb 24, 2020

Scientists Sculpt Nanoparticle Shells with Light

Posted by in categories: chemistry, nanotechnology, particle physics

For the first time, researchers have used light to control the shape of nanoparticles and create micron-size hollow shells from crystals of cuprous oxide (copper and oxygen). Such particles could have future applications as a low-cost catalyst to help pull excess carbon dioxide from the air, a way to improve microscopic imaging and more, says Bryce Sadtler, a chemist at Washington University in St. Louis and senior author of a study on the new method, published last October in Chemistry of Materials.


Hollowed-out microcrystals could lock away carbon.

Feb 23, 2020

Higgs Boson in Superconductors

Posted by in categories: materials, particle physics

Superfluid helium, describable by a two-component order parameter, exhibits only the Bogolubov mode with energy $\to 0$ at long wavelengths, while a Lorentz-invariant theory with a two-component order parameter exhibits a finite energy mode at long wavelengths (the Higgs Boson), besides the above mass-less mode. The mass-less mode moves to high energies if it couples to electromagnetic fields (the Anderson-Higgs mechanism). Superconductors, on the other hand have been theoretically and experimentally shown to exhibit both modes. This occurs because the excitations in superconductors have an (approximate) particle-hole symmetry and therefore show a similarity to Lorentz-invariant theories.

Feb 23, 2020

Five mysteries the Standard Model can’t explain

Posted by in category: particle physics

Our best model of particle physics explains only about 5 percent of the universe.