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Archive for the ‘particle physics’ category: Page 6

Aug 22, 2024

Molecular wires with a twist

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

From the high-voltage wires that carry electricity over long distances, to the tungsten filaments in our incandescent lights, we may have become accustomed to thinking that electrical conductors are always made of metal. But for decades, scientists have been working on advanced materials based on carbon-based oligomer chains that can also conduct electricity. These include the organic light-emitting devices found in some modern smartphones and computers.

In quantum mechanics, electrons are not just point particles with definite positions, but rather can become ‘delocalized’ over a region. A molecule with a long stretch of alternating single-and double-bonds is said to have pi-conjugation, and conductive polymers operate by allowing delocalized electrons to hop between pi-conjugated regions – somewhat like a frog hopping between nearby puddles. However, the efficiency of this process is limited by differences in the energy levels of adjacent regions.

Fabricating oligomers and polymers with more uniform energy levels can lead to higher electrical conductivity, which is necessary for the development of new practical organic electronics, or even single-molecule wires.

Aug 21, 2024

Heaviest antimatter particle ever discovered could hold secrets to our universe’s origins

Posted by in category: particle physics

The newly found antiparticle, called antihyperhydrogen-4, could have a potential imbalance with its matter counterpart that may help scientists understand how our universe came to be.

Aug 21, 2024

Atom Smasher Shatters Records With Heaviest Antimatter Discovery

Posted by in category: particle physics

Scientists sifting through six billion particle smashups detect roughly 16 “antihyperhydrogen-4” particles, the heaviest antimatter nucleus discovered to date.

A groundbreaking discovery of the heaviest antimatter nucleus yet has been made at the RHIC, involving an antiproton, two antineutrons, and an antihyperon. This research aids in understanding why matter dominates the universe and confirms the fundamental properties of antimatter, suggesting no significant differences in particle decay rates compared to matter.

Discovery of a new antimatter nucleus.

Aug 21, 2024

First visualization of valence electrons reveals fundamental nature of chemical bonding

Posted by in categories: chemistry, engineering, particle physics

The distribution of outermost shell electrons, known as valence electrons, of organic molecules was experimentally observed for the first time by a team led by Nagoya University in Japan. As the interactions between atoms are governed by the valence electrons, their findings shine light on the fundamental nature of chemical bonds, with implications for pharmacy and chemical engineering. The results were published in the Journal of the American Chemical Society.

Aug 21, 2024

New heaviest exotic antimatter nucleus discovered

Posted by in category: particle physics

Scientists studying the tracks of particles streaming from six billion collisions of atomic nuclei at the Relativistic Heavy Ion Collider (RHIC)—an “atom smasher” that recreates the conditions of the early universe—have discovered a new kind of antimatter nucleus, the heaviest ever detected. Composed of four antimatter particles—an antiproton, two antineutrons, and one antihyperon—these exotic antinuclei are known as antihyperhydrogen-4.

Aug 21, 2024

Physicists develop new model that describes how filaments assemble into active foams

Posted by in categories: biological, nanotechnology, particle physics, robotics/AI

Many fundamental processes of life, and their synthetic counterparts in nanotechnology, are based on the autonomous assembly of individual particles into complex patterns. LMU physicist Professor Erwin Frey, Chair of Statistical and Biological Physics at LMU Munich and member of the ORIGINS Excellence Cluster, investigates the fundamental principles of this self-organization.

Aug 21, 2024

How a quantum sensor on the ISS could revolutionize space exploration

Posted by in categories: particle physics, quantum physics, space travel

I expect that space-based atom interferometry will lead to exciting new discoveries and fantastic quantum technologies impacting everyday life, and will transport us into a quantum future.

Aug 21, 2024

Can massive particles be seen as soliton solutions?

Posted by in categories: information science, particle physics

I wonder if the common relativistic wave equations contain a sort of soliton solutions, which might be considered as particle localisations.

Aug 21, 2024

Entanglement Entropies of Nuclear Systems Grow as the Volume of those Systems

Posted by in categories: particle physics, quantum physics

Quantum entanglement—spooky action at a distance—works differently inside the nuclei of atoms than it does in other systems.

Aug 21, 2024

Astronomers Discover Record-Breaking Twin Quasars in the Early Universe

Posted by in categories: cosmology, evolution, particle physics

Astronomers have identified the earliest pair of quasars, shining 900 million years post-Big Bang, revealing insights into galaxy mergers and the reionization era of the Universe.

An international team of astronomers, including members from the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), has discovered the earliest known pair of quasars using the Subaru Telescope and Gemini North telescope, both situated on Maunakea in Hawai’i. These quasars, powered by actively feeding supermassive black holes, emit intense radiation. This significant discovery will provide insights into the early evolution of the Universe.

About 400 million to 1 billion years after the Big Bang, something, possibly a combination of sources, unleashed enough radiation to strip the electrons from most of the hydrogen atoms, completely altering the nature of the Universe. Quasars are one potential source of the radiation that caused this “reionization” of the Universe. When matter falls into the supermassive black hole at the center of a galaxy, the matter heats up and releases radiation in a phenomenon known as a quasar.

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