Keyword: stringtheory

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  • Japanese Physicists Generate Strongest Magnetic Field Ever Achieved Indoors

    09/18/2018 2:22:00 PM PDT · by ETL · 55 replies
    Sci-News.com ^ | Sept 18, 2018 | News Staff / Source
    Physicists from the Institute for Solid State Physics at the University of Tokyo, Japan, have recorded the largest magnetic field ever generated indoors — a whopping 1,200 T (tesla)“Magnetic fields are one of the fundamental properties of a physical environment,” said lead author Dr. Daisuke Nakamura and colleagues.“They can be controlled with high precision and interact directly with electronic orbitals and spins; this makes them indispensable for research in areas of solid state physics such as magnetic materials, superconductors, semiconductors, strongly correlated electron materials, and other nanomaterials.”The researchers generated ultrahigh magnetic fields using the electromagnetic flux-compression (EMFC) technique.“We developed a...
  • Scientists receive $1.3 million to study new propulsion idea for spacecraft

    09/17/2018 4:44:12 PM PDT · by LibWhacker · 28 replies
    Univ. of Plymouth ^ | 9/17/18 | Alan Williams
    Spacecraft and satellites could in future be launched into space without the need for fuel, thanks to a revolutionary new theory. Dr Mike McCulloch, from the University of Plymouth, first put forward the idea of quantised inertia (QI) – through which he believes light can be converted into thrust – in 2007. He has now received $1.3million from the United States Defense Advanced Research Projects Agency (DARPA) for a four-year study which aims to make the concept a reality. The QI theory predicts that objects can be pushed by differences in the intensity of so-called Unruh radiation in space, similar...
  • Jet from Neutron-Star Merger GW170817 Appeared to Move Four Times Faster than Light

    09/13/2018 12:13:34 PM PDT · by ETL · 41 replies
    Sci-News.com ^ | Sep 12, 2018 | News Staff / Source
    Radio observations using a combination of NSF’s Very Long Baseline Array, the Karl G. Jansky Very Large Array and the Robert C. Byrd Green Bank Telescope have revealed that a fast-moving jet of particles broke out into interstellar space after a pair of neutron stars merged in NGC 4993, a lenticular galaxy approximately 130 million light-years from Earth.-snip- Called GW170817, the merger of two neutron stars sent gravitational waves rippling through space. It was the first event ever to be detected both by gravitational waves and electromagnetic waves, including gamma rays, X-rays, visible light, and radio waves.The aftermath of the...
  • 7 Quantum Particles Act Like Billions in Weird Physics Experiment

    09/11/2018 7:59:19 AM PDT · by ETL · 13 replies
    Space.com ^ | Sept 11, 2018 | Rafi Letzter, Live Science Staff Writer
    Physicists have revealed that just seven quantum particles can behave as if they were in a crowd of billions. At larger scales, matter goes through changes, called phase transitions, in which (for example) water turns into a solid (ice) or a vapor (steam). Scientists were used to seeing this behavior in large masses of molecules, but never in such a tiny cluster. In a new study, detailed today (Sept. 10) in the journal Nature Physics, researchers witnessed these phase transitions in systems made up of just seven light particles, or photons, which took on an exotic physical state known as a Bose-Einstein condensate (BEC). That's...
  • Scientists invent way to create 'unlimited renewable energy'

    09/09/2018 7:19:16 AM PDT · by ETL · 58 replies
    FoxNews.com/Science ^ | Sept 7, 2018 | Lauren Tousignant
    Scientists have reached a “milestone” in a technique of semi-artificial photosynthesis that could eventually create an “unlimited source of renewable energy,” according to a new study. Artificial photosynthesis has been around for decades, but scientists haven’t been able to develop it on a scale large enough to support an industrial level, or that could operate without the use of expensive or polluting devices. Semi-artificial photosynthesis, a relatively new field of study, aims to address those concerns by combining manmade technologies with biological processes in order to mimic nature’s method of splitting water into oxygen and hydrogen. In the latest study,...
  • For The First Time, Scientists Have Accelerated Electrons in a Plasma Wave

    09/02/2018 9:45:56 AM PDT · by BenLurkin · 38 replies
    sciencealert.com ^ | 2 SEP 2018 | DAVID NIELD
    That's a big deal, because it could lead to much smaller and cheaper particle accelerators than the ones we currently rely on. Right now, if you want to install a Large Hadron Collider (LHC) particle accelerator in your back garden, you need a concrete tunnel about 27 kilometres (nearly 17 miles) long and US$5 billion in spare change. But this new experiment uses something known as plasma wakefield acceleration – and it takes up just 10 metres or 33 feet of space. The team behind the Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) at CERN in Geneva has been...
  • Quantum weirdness in 'chicken or egg' paradox

    09/04/2018 7:29:58 AM PDT · by BenLurkin · 33 replies
    pys.org ^ | September 3, 2018, | University of Queensland
    The University of Queensland and the NÉEL Institute has shown that, as far as quantum physics is concerned, the chicken and the egg can both come first. Dr Jacqui Romero from the ARC Centre of Excellence for Engineered Quantum Systems said that in quantum physics, cause-and-effect is not always as straightforward as one event causing another. "The weirdness of quantum mechanics means that events can happen without a set order," she said. "Take the example of your daily trip to work, where you travel partly by bus and partly by train. "Normally, you would take the bus then the train,...
  • Cosmic zombies: Black holes can reanimate dead stars

    08/31/2018 9:14:04 AM PDT · by ETL · 20 replies
    Space.com ^ | August 30, 2018 | Mike Wall, Space.com Senior Writer
    Close encounters with medium-size black holes can reanimate dead stars, if only momentarily, a new study suggests. A team of astronomers performed computer simulations to determine what happens when a burned-out stellar corpse known as a white dwarf passes close to an intermediate-mass black hole — one that harbors between 1,000 and 10,000 times the mass of Earth's sun. The researchers determined that the black hole's powerful gravity can stretch and distort the white dwarf's previously inert innards so dramatically that nuclear-fusion processes can reignite for a few seconds, converting helium, carbon and oxygen into heavier elements such as iron....
  • A novel graphene quantum dot structure takes the cake

    08/23/2018 6:26:43 PM PDT · by BenLurkin · 7 replies
    phys.org ^ | August 23, 2018 by | Ben P. Stein
    In a marriage of quantum science and solid-state physics, researchers at the National Institute of Standards and Technology (NIST) have used magnetic fields to confine groups of electrons to a series of concentric rings within graphene, a single layer of tightly packed carbon atoms. This tiered "wedding cake," which appears in images that show the energy level structure of the electrons, experimentally confirms how electrons interact in a tightly confined space according to long-untested rules of quantum mechanics. The findings could also have practical applications in quantum computing. Graphene is a highly promising material for new electronic devices because of...
  • Plasma Scientists Created Invisible, Whooping 'Whistlers' in a Lab

    08/19/2018 5:08:37 PM PDT · by BenLurkin · 7 replies
    space.com ^ | August 17, 2018 07:10am ET | Rafi Letzter, Live Science Staff Writer |
    There's a sort of radio wave that bangs its way around Earth, knocking around electrons in the plasma fields of loose ions surrounding our planet and sending strange tones to radio detectors. It's called a "whistler." And now, scientists have observed bursts like this in more detail than ever before. Whistlers, typically created during certain lightning strikes, usually travel along Earth's magnetic-field lines. Humans first detected them more than a century ago, thanks to their ability to make a "whistling" sound (really more like a ghostly recording of laser blasts in a "Star Wars" movie) when picked up by a...
  • Everything Worth Knowing About ... Entanglement

    08/18/2018 9:28:36 PM PDT · by blam · 16 replies
    Discover Magazine ^ | 8-18-2018 | Devin Powell
    Up until last year, mathematician Peter Bierhorst had hoped the physicists he works with would fail. It was nothing personal. He just found their worldview a little disturbing. Like most physicists, his co-workers believe that our universe’s particles can influence each other using a sort of telepathy. Called “entanglement,” this connection allows two particles separated by vast distances to behave as a single entity. Both instantly react to something that happens to one of them. If you find this very weird and counterintuitive, you’re not alone. “I find this very weird and counterintuitive,” says Bierhorst, a postdoc at the National...
  • The Universe Is Disappearing, And There's Nothing We Can Do To Stop It

    08/18/2018 8:10:32 PM PDT · by EdnaMode · 117 replies
    Forbes ^ | August 17, 2018 | Ethan Siegel
    It's been nearly a century since scientists first theorized that the Universe was expanding, and that the farther away a galaxy was from us, the faster it appears to recede. This isn't because galaxies are physically moving away from us, but rather because the Universe is full of gravitationally-bound objects, and the fabric of space that those objects reside in is expanding. But this picture, which held sway from the 1920s onward, has been recently revised. It's been only 20 years since we first realized that this expansion was speeding up, and that as time goes on, individual galaxies will...
  • “Deep Space of the Cosmos” –There’s a Mysterious Energy Latent In It Which Can Tell Us About Our...

    08/16/2018 3:02:08 AM PDT · by LibWhacker · 35 replies
    The Daily Galaxy ^ | 8/15/18 (posted)
    “Deep Space of the Cosmos” –There’s a Mysterious Energy Latent In It Which Can Tell Us About Our Fate  Posted on Aug 15, 2018 “Empty space seems to be nothing to us. By analogy, water may seem to be nothing to a fish – it’s what’s left when you take away all the other things floating in the sea. Likewise, empty space is conjectured to be quite complicated,” Martin Rees, Astronomer Royal and Emeritus Professor of Cosmology and Astrophysics at the University of Cambridge.Philosophers have debated the nature of “nothing” for thousands of years, but what has modern science got...
  • Supermassive black hole found in tiny galaxy, wowing researchers

    08/14/2018 6:31:50 PM PDT · by ETL · 36 replies
    FoxNews.com/Science ^ | Aug 14, 2018 | Chris Ciaccia
    A supermassive black hole has been found at the center of a tiny galaxy, a rare find. What makes the discovery even more unique is that it has been located in an ultracompact dwarf galaxy, stunning researchers. The findings, published in the Monthly Notices of the Royal Astronomical Society, note that the galaxy Fornax UCD3 is part of a set called ultracompact dwarfs (UCDs), a very rare set of galaxies. "We have discovered a supermassive black hole in the center of Fornax UCD3," said the study's lead author, Anton Afanasiev, in a statement. "The black hole mass is 3.5 million...
  • Researchers Find Source of Strange 'Negative' Gravity

    08/13/2018 3:41:56 PM PDT · by plain talk · 84 replies
    LiveScience ^ | August 10, 2018 | Rafi Letzler
    Sound has negative mass, and all around you it's drifting up, up and away — albeit very slowly. That's the conclusion of a paper submitted on July 23 to the preprint journal arXiv, and it shatters the conventional understanding that researchers have long had of sound waves: as massless ripples that zip through matter, giving molecules a shove but ultimately balancing any forward or upward motion with an equal and opposite downward motion. That's a straightforward model that will explain the behavior of sound in most circumstances, but it's not quite true, the new paper argues. A phonon — a...
  • Physicists Entangle Two Macroscopic-Scale Objects [Apr 2018]

    08/08/2018 2:58:41 PM PDT · by ETL · 32 replies
    Sci-News.com ^ | Apr 30, 2018 | News Staff / Source
    “Harnessing the mysterious property that Albert Einstein called ‘spooky action at a distance’ is a crucial step toward exploiting quantum quirks for technology such as new kinds of sensors or computers,” the physicists said. “Entanglement is not just some academic curiosity; it’s also something you can harness as a basis for doing useful things with quantum mechanics,” Professor Clerk added. Entangled states are typically extremely fragile — especially so when they involve large objects. So Professor Clerk and his colleague, Dr. Matt Woolley from the University of New South Wales, developed a theoretical proposal for how to keep the motion...
  • The universe is expanding. but astrophysicists aren't sure how fast

    08/08/2018 11:39:48 AM PDT · by ETL · 49 replies
    LiveScience.com ^ | Aug 7, 2018 | Thomas Kitching, UCL
    Next time you eat a blueberry (or chocolate chip) muffin consider what happened to the blueberries in the batter as it was baked. The blueberries started off all squished together, but as the muffin expanded they started to move away from each other. If you could sit on one blueberry you would see all the others moving away from you, but the same would be true for any blueberry you chose. In this sense galaxies are a lot like blueberries. Since the Big Bang, the universe has been expanding. The strange fact is that there is no single place from...
  • Physicists Tied Laser Beams into Knots

    08/06/2018 11:02:50 AM PDT · by BenLurkin · 13 replies
    space.com ^ | August 6, 2018 10:37am ET | Rafi Letzter, Live Science Staff Writer |
    The knots in question, the researchers wrote in their paper, were visible enough in images of the light wave data for them to identify the figure eights and toruses. ... To create the knots, the researchers carefully tuned the up-and-down and side-to-side wave motion (the polarization) of two beams of light, partly using technology not unlike that found in polarized sunglasses. The knots formed around "polarization singularities" where the beams intersected, places where the side-to-side and up-and-down wavelengths were exactly equal, and a number of other wavelengths of light looped around them. At those points, light bent in the way...
  • String Theory May Create Far Fewer Universes Than Thought

    07/30/2018 3:26:36 PM PDT · by LibWhacker · 42 replies
    Space.com ^ | 7/30/18 | Clara Moskowitz
    The problem with string theory, according to some physicists, is that it makes too many universes. It predicts not one but some 10500 versions of spacetime, each with their own laws of physics. But with so many universes on the table, how can the theory explain why ours has the features it does? Now some theorists suggest most—if not all—of those universes are actually forbidden, at least if we want them to have stable dark energy, the supposed force accelerating the expansion of the cosmos. To some, eliminating so many possible universes is not a drawback but a major step...
  • The Peculiar Math That Could Underlie the Laws of Nature

    07/21/2018 6:18:51 PM PDT · by DUMBGRUNT · 70 replies
    20July 2018 | Natalie Wolchover
    New findings are fueling an old suspicion that fundamental particles and forces spring from strange eight-part numbers called “octonions.” “Octonions are to physics what the Sirens were to Ulysses,” Decades on, no particles beyond those of the Standard Model have been found. Meanwhile, the strange beauty of the octonions has continued to attract the occasional independent-minded researcher, including Furey, the Canadian grad student who visited Günaydin four years ago. Looking like an interplanetary traveler, with choppy silver bangs that taper to a point between piercing blue eyes, Furey scrawled esoteric symbols on a blackboard, trying to explain to Günaydin that...