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Archive for the ‘particle physics’ category: Page 370

Dec 10, 2020

Black Hole Jets Could Be Fueled by Strange ‘Negative Energy’, Astronomers Find

Posted by in categories: computing, cosmology, particle physics

When a black hole is actively feeding, something strange can be observed: enormously powerful jets of plasma shoot from its poles, at velocities approaching light speed.

Given the intense gravitational interactions at play, exactly how those jets form is a mystery. But now, using computer simulations, a team of physicists has hit upon an answer — particles seeming to have “negative energy” extract energy from the black hole and redirect it to the jets.

And this theory has, for the first time, united two different and seemingly irreconcilable theories about how energy can be extracted from a black hole.

Dec 10, 2020

Black Hole Atom as a Dark Matter Particle Candidate

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

Circa 2014


We propose the new dark matter particle candidate—the “black hole atom,” which is an atom with the charged black hole as an atomic nucleus and electrons in the bound internal quantum states. As a simplified model we consider the central Reissner-Nordström black hole with the electric charge neutralized by the internal electrons in bound quantum states. For the external observers these objects would look like the electrically neutral Schwarzschild black holes. We suppose the prolific production of black hole atoms under specific conditions in the early universe.

Dec 10, 2020

Aquatic robot inspired by sea creatures walks, rolls, transports cargo

Posted by in categories: chemistry, particle physics, robotics/AI

Northwestern University researchers have developed a first-of-its-kind life-like material that acts as a soft robot. It can walk at human speed, pick up and transport cargo to a new location, climb up hills and even break-dance to release a particle.

Nearly 90% water by weight, the centimeter-sized moves without complex hardware, hydraulics or electricity. Instead, it is activated by light and walks in the direction of an external rotating .

Resembling a four-legged octopus, the robot functions inside a water-filled tank, making it ideal for use in aquatic environments. The researchers imagine customizing the movements of miniature robots to help catalyze different chemical reactions and then pump out the valuable products. The robots also could be molecularly designed to recognize and actively remove unwanted particles in specific environments, or to use their mechanical movements and locomotion to precisely deliver bio-therapeutics or cells to specific tissues.

Dec 9, 2020

Hidden symmetry could be key to more robust quantum systems, researchers find

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

Researchers have found a way to protect highly fragile quantum systems from noise, which could aid in the design and development of new quantum devices, such as ultra-powerful quantum computers.

The researchers, from the University of Cambridge, have shown that microscopic particles can remain intrinsically linked, or entangled, over long distances even if there are random disruptions between them. Using the mathematics of quantum theory, they discovered a simple setup where entangled particles can be prepared and stabilized even in the presence of noise by taking advantage of a previously unknown symmetry in .

Their results, reported in the journal Physical Review Letters, open a new window into the mysterious quantum world that could revolutionize future technology by preserving in , which is the single biggest hurdle for developing such technology. Harnessing this capability will be at the heart of ultrafast quantum computers.

Dec 9, 2020

What If Humanity Was a Class 2 Society? | Alternative Scale | Unveiled

Posted by in categories: particle physics, space

There’s more than one way to rank future civilizations, you know! Regular viewers will know all about the Kardashev Scale, but now there’s a NEW theory in town! In this video, Unveiled journeys to the future of humanity to ask; What will we look like? What will we be like? And how much will we have changed?

This is Unveiled, giving you incredible answers to extraordinary questions!

Continue reading “What If Humanity Was a Class 2 Society? | Alternative Scale | Unveiled” »

Dec 8, 2020

Research group has made a defect-resistant superalloy that can be 3D-printed

Posted by in categories: chemistry, economics, engineering, nuclear energy, particle physics, space

In recent years, it has become possible to use laser beams and electron beams to “print” engineering objects with complex shapes that could not be achieved by conventional manufacturing. The additive manufacturing (AM) process, or 3D printing, for metallic materials involves melting and fusing fine-scale powder particles—each about 10 times finer than a grain of beach sand—in sub-millimeter-scale “pools” created by focusing a laser or electron beam on the material.

“The highly focused beams provide exquisite control, enabling ‘tuning’ of properties in critical locations of the printed object,” said Tresa Pollock, a professor of materials and associate dean of the College of Engineering at UC Santa Barbara. “Unfortunately, many advanced metallic alloys used in extreme heat-intensive and chemically corrosive environments encountered in energy, space and nuclear applications are not compatible with the AM process.”

The challenge of discovering new AM-compatible materials was irresistible for Pollock, a world-renowned scientist who conducts research on advanced metallic materials and coatings. “This was interesting,” she said, “because a suite of highly compatible alloys could transform the production of having high economic value—i.e. materials that are expensive because their constituents are relatively rare within the earth’s crust—by enabling the manufacture of geometrically complex designs with minimal material waste.

Dec 8, 2020

Quantum Computing Marks New Breakthrough, Is 100 Trillion Times More Efficient

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

In what could be one of the significant developments in the field of quantum computing, Chinese researchers suggest having achieved quantum supremacy with the capability of performing calculations 100 trillion times faster than the world’s most advanced supercomputer. Researchers from the University of Science and Technology of China, Hefei, believe that when put into practical use, it can carry calculations in minutes which would have otherwise taken two billion years to perform. The fastest supercomputers, before this, claimed to have achieved computational efficiency easing up to 10,000 years of calculations.

Jiuzhang, as the supercomputer is called, has outperformed Google’s supercomputer, which the company had claimed last year to have achieved quantum computing supremacy. The supercomputer by Google named Sycamore is a 54-qubit processor, consisting of high-fidelity quantum logic gates that could perform the target computation in 200 seconds.

Continue reading “Quantum Computing Marks New Breakthrough, Is 100 Trillion Times More Efficient” »

Dec 8, 2020

Complete Genomic Sequence of Human Coronavirus OC43: Molecular Clock Analysis Suggests a Relatively Recent Zoonotic Coronavirus Transmission Event

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

Coronaviruses are enveloped, positive-stranded RNA viruses with a genome of approximately 30 kb. Based on genetic similarities, coronaviruses are classified into three groups. Two group 2 coronaviruses, human coronavirus OC43 (HCoV-OC43) and bovine coronavirus (BCoV), show remarkable antigenic and genetic similarities. In this study, we report the first complete genome sequence (30,738 nucleotides) of the prototype HCoV-OC43 strain (ATCC VR759). Complete genome and open reading frame (ORF) analyses were performed in comparison to the BCoV genome. In the region between the spike and membrane protein genes, a 290-nucleotide deletion is present, corresponding to the absence of BCoV ORFs ns4.9 and ns4.8. Nucleotide and amino acid similarity percentages were determined for the major HCoV-OC43 ORFs and for those of other group 2 coronaviruses. The highest degree of similarity is demonstrated between HCoV-OC43 and BCoV in all ORFs with the exception of the E gene. Molecular clock analysis of the spike gene sequences of BCoV and HCoV-OC43 suggests a relatively recent zoonotic transmission event and dates their most recent common ancestor to around 1890. An evolutionary rate in the order of 4 × 10−4 nucleotide changes per site per year was estimated. This is the first animal-human zoonotic pair of coronaviruses that can be analyzed in order to gain insights into the processes of adaptation of a nonhuman coronavirus to a human host, which is important for understanding the interspecies transmission events that led to the origin of the severe acute respiratory syndrome outbreak.

Coronaviruses are large (120- to 160-nm), roughly spherical particles with a linear, nonsegmented, capped, and polyadenylated positive-sense single-stranded RNA genome that is encapsidated in a helical nucleocapsid. The envelope is derived from intracellular membranes and contains a characteristic crown of widely spaced club-shaped spikes that are 12 to 24 nm long. The genus Coronavirus (International Committee on the Taxonomy of Viruses database [ICTVdb], virus code 03.019.0.1) belongs to the family Coronaviridae in the order Nidovirales (7, 8).

Before the 2002-to-2003 severe acute respiratory syndrome (SARS) epidemic, coronaviruses were somewhat neglected in human medicine, but they have always been of considerable importance in animal health. Coronaviruses infect a variety of livestock, poultry, and companion animals, in whom they can cause serious and often fatal respiratory, enteric, cardiovascular, and neurologic diseases (25). Most of our understanding about the molecular pathogenic properties of coronaviruses has been achieved by the veterinary virology community.

Dec 8, 2020

DUNE publishes first physics results from prototype detector

Posted by in category: particle physics

The DUNE collaboration has published their first scientific paper based on data collected with the ProtoDUNE single-phase detector located at CERN’s Neutrino Platform. The results show that the detector is performing with greater than 99% efficiency, making it not only the largest, but also the best-performing liquid-argon time projection chamber to date. Scientists now are using their findings to refine their experimental techniques and prepare for the construction of the international Deep Underground Neutrino Experiment at the Long-Baseline Neutrino Facility, a next-generation neutrino experimental program hosted by the Department of Energy’s Fermilab in the United States.

“These first results are great news for us,” said DUNE co-spokesperson Stefan Söldner-Rembold, professor at the University of Manchester in the UK. “They show that the ProtoDUNE-SP detector works even better than anticipated. Now we are ready for the construction of the first components for the DUNE detector, which will feature detector modules based on this prototype, but 20 times larger.”

DUNE is an ambitious international experiment that will measure the properties of tiny fundamental particles called neutrinos. Neutrinos are the most abundant matter particle in the universe, but because they rarely interact with other particles, they are incredibly difficult to study. There are at least three different types of neutrinos, and, every second, 65 billion of them pass through each square centimeter of Earth. As they travel, they do something peculiar: They change from one type to another. Scientists think that these neutrino oscillations — as well as oscillations involving antimatter neutrinos — could help answer some of the big questions in physics, such as the observed matter-antimatter asymmetry in the universe. DUNE will also look for neutrinos from supernovae and search for rare subatomic processes such as proton decay.

Dec 7, 2020

MIT’s ABRACADABRA Instrument: Pulling the Secrets of Dark Matter Out of a Hat

Posted by in categories: cosmology, particle physics

MIT grad student Chiara Salemi and Professor Lindley Winslow use the ABRACADABRA instrument to reveal insights into dark matter.

On the first floor of MIT’s Laboratory for Nuclear Science hangs an instrument called “A Broadband/Resonant Approach to Cosmic Axion Detection with an Amplifying B-field Ring Apparatus,” or ABRACADABRA for short. As the name states, ABRACADABRA’s goal is to detect axions, a hypothetical particle that may be the primary constituent of dark matter, the unseen and as-of-yet unexplained material that makes up the bulk of the universe.