Menu

Blog

Archive for the ‘particle physics’ category: Page 398

Feb 7, 2017

Sorry, Einstein — physicists just reinforced the reality of quantum weirdness in the Universe

Posted by in categories: particle physics, quantum physics

One of the strangest phenomena you’re likely to come across in all of science is quantum entanglement — where two particles interact in such a way that they become deeply linked, and essentially ‘share’ an existence, even if they’re light-years apart.

Einstein famously couldn’t get on board with this idea, and ultimately decided that it was just too weird to be true. But a new experiment has just made the strongest case yet for the reality of quantum entanglement, so it looks like our Universe is just as bizarre as we suspected.

“The real estate left over for the skeptics of quantum mechanics has shrunk considerably,” one of the team, David Kaiser from MIT, told Jennifer Chu at Phys.org.

Continue reading “Sorry, Einstein — physicists just reinforced the reality of quantum weirdness in the Universe” »

Feb 6, 2017

Scientists Measure Single Quantum of Heat

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

IBM researchers have established experimental proof of a previously difficult-to-prove law of physics, and in so doing may have pointed to a way to overcome many of the heat management issues faced in today’s electronics. Researchers at IBM Zurich have been able to take measurements of the thermal conductance of metallic quantum point contacts made of gold. No big deal, you say? They conducted measurements at the single-atom level, at room temperature—the first time that’s ever been done.

These measurements confirm the Wiedemann–Franz law, which predicts that the smallest amount of heat that can be carried across a metallic junction — a single quantum of heat — is directly proportional to the quantum of electrical conductance through the same junction. By experimentally confirming this law, it can now be used with confidence to predict and to explore nanoscale thermal and electrical phenomena affecting materials down to the size of few atoms or a single molecule.

Continue reading “Scientists Measure Single Quantum of Heat” »

Feb 6, 2017

IBM Scientists Measure Heat-Transfer through Single Atoms

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

Published today, using a technique which looks like trampoline, IBM scientists have measured the thermal conductance of metallic quantum point contacts made of gold down to the single-atom level at room temperature for the first time.

As everything scales to the nanoscale, heat – more precisely, the loss of it – becomes an issue in device reliability. To address this, last year, IBM scientists in Zurich and students from ETH Zurich published and patented a technique to measure the temperature of these nano-sized objects at and below 10 nanometer – a remarkable achievement. They called the novel technique scanning probe thermometry (video) and it provided engineers, for the first time, with the ability to map heat loss across a chip, and, more importantly, map heat loss down to the single device level and to map temperature distributions.

Read more

Feb 4, 2017

Scientific Experiments Show That DNA Begins as a Quantum Wave and Not as a Molecule

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

Another example proving the importance of quantum is core to bio. Quantum is a core component in all things (bio, environmental, geo & minerals, vegetation, energy, etc.).


By Lance Schuttler, contributor for TheMindUnleashed.com

One strand of DNA from one single cell contains enough information to clone an entire organism. Obviously, understanding DNA allows us to understand much about life and the universe around us. A deeper understanding of the new science tell us that DNA beings not as a molecule, but as a wave form. Even more interestingly, this wave form exists as a pattern within time and space and is coded throughout the entire universe.

Continue reading “Scientific Experiments Show That DNA Begins as a Quantum Wave and Not as a Molecule” »

Feb 4, 2017

Cold Plasma Can Help Treat Non-Healing Wounds and Trigger Cellular Regeneration

Posted by in categories: biotech/medical, particle physics

In Brief Research by Russian scientists has revealed the efficacy of cold plasma as a treatment for non-healing wounds. Their study conclusions could lead to much-needed relief for the millions of people suffering from chronic open wounds.

Non-healing wounds are troublesome to treat, with current methods teetering between extremely difficult and impossible, but cold plasma might be able to change all that.

Researchers have attempted to use cold atmospheric-pressure plasma — a partially ionized gas with a proportion of charged particles close to 1 percent and a temperature of 99,726°C (179,540ºF) — for medical treatment before, but never specifically for non-healing wounds. Apart from confirming the bactericidal properties of cold plasma and showing that cells and tissues have a high resistance to it, those earlier studies yielded non-conclusive results.

Continue reading “Cold Plasma Can Help Treat Non-Healing Wounds and Trigger Cellular Regeneration” »

Feb 4, 2017

Scientists Simulate a New Material That Could Be Even Weirder Than Graphene

Posted by in categories: computing, nanotechnology, particle physics

We all love graphene — the one-atom-thick sheets of carbon aren’t just super flexible, harder than diamond, and stronger than steel, they’ve also recently become superconductors in their own right.

But it’s not the only over-achieving nanomaterial out there. Researchers have just simulated a stretched out, one-dimensional (1D) chain of boron, predicting that the material could have even weirder properties than graphene.

Continue reading “Scientists Simulate a New Material That Could Be Even Weirder Than Graphene” »

Feb 3, 2017

Scientists Have Turned Cooking Oil Into a Material 200 Times Stronger Than Steel

Posted by in categories: mobile phones, nanotechnology, particle physics, solar power, sustainability

Graphene cooking oil?


In Brief

  • Researchers have discovered a way to make soybean oil into the super-strong material graphene. The material has a wide variety of potential uses and can revolutionize electronics.
  • The material could be used to make cell phone batteries last 25 percent longer, make more effective solar cells, and even filter fuel out of air.

Researchers have found a way to turn cheap, everyday cooking oil into the wonder material graphene – a technique that could greatly reduce the cost of making the much-touted nanomaterial.

Continue reading “Scientists Have Turned Cooking Oil Into a Material 200 Times Stronger Than Steel” »

Feb 3, 2017

Neutrons reveal ‘quantum tunnelling’ on graphene enables the birth of stars

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

Graphene is known as the world’s thinnest material due to its 2-D structure, in which each sheet is only one carbon atom thick, allowing each atom to engage in a chemical reaction from two sides. Graphene flakes can have a very large proportion of edge atoms, all of which have a particular chemical reactivity. In addition, chemically active voids created by missing atoms are a surface defect of graphene sheets. These structural defects and edges play a vital role in carbon chemistry and physics, as they alter the chemical reactivity of graphene. In fact, chemical reactions have repeatedly been shown to be favoured at these defect sites.

Interstellar molecular clouds are predominantly composed of hydrogen in molecular form (H2), but also contain a small percentage of dust particles mostly in the form of carbon nanostructures, called polyaromatic hydrocarbons (PAH). These clouds are often referred to as ‘star nurseries’ as their low temperature and high density allows gravity to locally condense matter in such a way that it initiates H fusion, the nuclear reaction at the heart of each star. Graphene-based materials, prepared from the exfoliation of graphite oxide, are used as a model of interstellar carbon dust as they contain a relatively large amount of , either at their edges or on their surface. These defects are thought to sustain the Eley-Rideal chemical reaction, which recombines two H into one H2 molecule.

The observation of interstellar clouds in inhospitable regions of space, including in the direct proximity of giant stars, poses the question of the origin of the stability of hydrogen in the molecular form (H2). This question stands because the clouds are constantly being washed out by intense radiation, hence cracking the hydrogen molecules into atoms. Astrochemists suggest that the chemical mechanism responsible for the recombination of atomic H into molecular H2 is catalysed by carbon flakes in interstellar clouds. Their theories are challenged by the need for a very efficient surface chemistry scenario to explain the observed equilibrium between dissociation and recombination. They had to introduce highly reactive sites into their models so that the capture of an atomic H nearby occurs without fail.

Continue reading “Neutrons reveal ‘quantum tunnelling’ on graphene enables the birth of stars” »

Feb 2, 2017

Viral protein transforms as it measures out DNA

Posted by in categories: biotech/medical, genetics, particle physics

To generate swarms of new viral particles, a virus hijacks a cell into producing masses of self-assembling cages that are then loaded with the genetic blueprint for the next infection. But the picture of how that DNA is loaded into those viral cages, or capsids, was blurry, especially for two of the most common types of DNA virus on earth, bacterial viruses and human herpesvirus. Jefferson researchers pieced together the three-dimensional atomic structure of a doughnut-shaped protein that acts like a door or ‘portal’ for the DNA to get in and out of the capsid, and have now discovered that this protein begins to transform its structure when it comes into contact with DNA. Their work published in Nature Communications.

“Researchers thought that the portal protein acts as an inert passageway for DNA,” says senior author Gino Cingolani, Ph.D., a Professor in the Department of Biochemistry and Molecular Biology at Thomas Jefferson University and researcher at the Sidney Kimmel Cancer Center. “We have shown that the portal is much more like a sensor that essentially helps measure out an appropriate length of DNA for each capsid particle, ensuring faithful production of new viral particles.”

The finding solves a longstanding puzzle in the field, and reveals a potential drug target for one of the most common human viral pathogens, herpesviruses, which is responsible for diseases such as chicken pox, mononucleosis, lymphomas and Kaposi sarcoma.

Read more

Feb 2, 2017

What Quantum Gravity Needs Is More Experiments

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

Agree; math is a must. However, experimentation is when the rubber meets the road.


In the mid-1990s, I studied mathematics. I wasn’t really sure just what I wanted to do with my life, but I was awed by the power of mathematics to describe the natural world. After classes on differential geometry and Lie algebras, I attended a seminar series offered by the math department about the greatest problem in fundamental physics: how to quantize gravity and thereby bring all the forces of nature under one theoretical umbrella. The seminars focused on a new approach pioneered by Abhay Ashtekhar at Penn State University. It wasn’t research I had previously encountered, and I came away with the impression that the problem had been solved; the news just hadn’t yet spread.

It seemed a clear victory for pure thought. The requirement of mathematical consistency also led, for example, to the discovery of the Higgs boson. Without the Higgs, the Standard Model of particle physics would stop working for particles that are collided at energies above 1 teraelectron-volts, well within the range of the Large Hadron Collider. Probabilities would no longer add to 100 percent and would cease to make mathematical sense. Something new thus had to turn up once that energy was crossed. The Higgs was the simplest possibility that physicists could think of—and, sure enough, they found it.

Continue reading “What Quantum Gravity Needs Is More Experiments” »