No Big Bang? Quantum equation predicts universe has no beginning. (Phys.org) —The universe may have existed forever, according to a new model that applies quantum correction terms to complement Einstein's theory of general relativity.
The model may also account for dark matter and dark energy, resolving multiple problems at once. The widely accepted age of the universe, as estimated by general relativity, is 13.8 billion years. In the beginning, everything in existence is thought to have occupied a single infinitely dense point, or singularity. Only after this point began to expand in a "Big Bang" did the universe officially begin. Although the Big Bang singularity arises directly and unavoidably from the mathematics of general relativity, some scientists see it as problematic because the math can explain only what happened immediately after—not at or before—the singularity.
Old ideas revisited The physicists emphasize that their quantum correction terms are not applied ad hoc in an attempt to specifically eliminate the Big Bang singularity. Kandiru comments on Chemists Confirm the Existence of New Type of Bond. Superconductivity without cooling : science. A few days ago, CERN launched an Open Data Portal to publicly share data from the Large Hadron Collider. We are some of the scientists behind this project, working to make science more open globally. Ask Us (Almost) Anything about open data, open access,
Freakishly Compact Particle Accelerators Could Revolutionize Physics. Computer Simulation Confirms the Possibility of Time Travel. Using photons, Australian scientists managed to create a model in which quantum particles can move back in time.
As it turned out, the laws of standard quantum mechanics may be violated at the same time. Physicists from the University of Queensland in Australia set out to simulate a computer experiment, which could prove the possibility of time travel at the quantum level, predicted in 1991. Are High Energy Neutrinos from Outer Space Really a Big Deal? Hooray!
Goldberg is back! Awesome! "The energy range for these neutrinos was approximately 1 Petaelectronvolt, which to put things in perspective, is roughly 140 times the peak energy of particles in the Large Hadron Collider. It's thousands of times more energy than found in the mass of any particle we've ever yet discovered, which raises the obvious question: where the hell did these things come from? " Yes, in all seriousness, this is a profound mystery. Although I wouldn't be surprised if some io9 wag would cite images of Event Horizon on the literal assumption that these things are being hatched by Satan. Anyway, Dave, I have a request: Please, please, please! Scientists Work Out How To Make Matter From Light. Theoretical physicists have proposed a way they think will allow us to create matter from light.
The experiment has yet to be done, but has passed peer review as practical and the inventors are in discussions with experimentalists with the equipment to carry it out. The proposal has created excitement because, while it has been accepted for 80 years that two photons of light could theoretically create matter, for that time the demonstrational proof was regarded as beyond the reach of lab equipment. As Einstein's much quoted, but seldom understood, equation e=mc2 tells us, matter and energy are connected. Scientists Detect A Particle That Could Be A New Form Of Matter. Fascinating.
Although, I have to wonder what the straight forward real world application to this would be? I understand very basically what is being said, but I don't know if this has any theoretical technological benefits? Or is this more of a cataloguing issue? New State of Matter Discovered. There was a time when states of matter were simple: Solid, liquid, gas.
Then came plasma, Bose -Einstein condensate, supercritical fluid and more. Now the list has grown by one more, with the unexpected discovery of a new state dubbed “dropletons” that bear some resemblance to liquids but occur under very different circumstances. The discovery occurred when a team at the University of Colorado Joint Institute for Lab Astrophysics were focusing laser light on gallium arsenide (GaAs) to create excitons. Excitons are formed when a photon strikes a material, particularly a semiconductor. A New Record for the Highest Temperature We've Ever Created: A Whopping 4 Trillion Degrees Celsius.
We are in a moment of transition.
Every day, we discover something new, something inspiring, something awesome... for a billion negative things in our world, there are a billion-billion positive ones, if only we take the time to understand. I want to see the sunrise on another world. I want to know what lies beyond what we know now. I want to face the future, and if it is dark - then I want to try to bring some light to it. Brookhaven National Laboratory — a passion for discovery. Quantum Cloud Simulates Magnetic Monopole. Physicists have created and photographed an isolated north pole — a monopole — in a simulated magnetic field, bringing to life a thought experiment that first predicted the existence of actual magnetic monopoles more than 80 years ago.
In nature, north and south magnetic poles always go hand in hand. Cutting a bar magnet in half just creates two magnets, each of which still has two poles, rather than creating separate north and south poles on each half. Synthetic magnetic monopoles have been created in the lab. A magnet always has a north and a south pole.
Even if a magnet is cut in half down to the atomic level, magnetic fields are bipolar. However, in 1931 it was theorized that there are natural monopoles which help explain some of the peculiarities of magnetism. This has never before been tested because scientists have not been able to create monopole elementary particles in the lab that could be studied individually - until now. The research was led by David Hall of Amherst College and the results were published in Nature. Hall’s lab was able to create the monopole particles by chilling rubidium atoms to less than 100-billionths of a degree warmer than absolute zero. For the first time, physicists will be able to test the theories laid out by Paul Dirac 83 years ago.
Physicists say energy can be teleported 'without a limit of distance' I would say the future is now, but really it's almost here. ...get it?
Yes, electrons are perfectly round. There is no pink light. Accelerator on a chip: Technology could spawn new generations of smaller, less expensive devices for science, medicine. In an advance that could dramatically shrink particle accelerators for science and medicine, researchers used a laser to accelerate electrons at a rate 10 times higher than conventional technology in a nanostructured glass chip smaller than a grain of rice. The achievement was reported today in Nature by a team including scientists from the U.S. Department of Energy's (DOE) SLAC National Accelerator Laboratory and Stanford University. "We still have a number of challenges before this technology becomes practical for real-world use, but eventually it would substantially reduce the size and cost of future high-energy particle colliders for exploring the world of fundamental particles and forces," said Joel England, the SLAC physicist who led the experiments.
"It could also help enable compact accelerators and X-ray devices for security scanning, medical therapy and imaging, and research in biology and materials science. " The Very First Image of a Hydrogen Bond. If Time Were 2D… - From Quarks to Quasars. Question: There are lots of articles written about trying to imagine a 4th dimension of space, but what would it be like to live in a universe with a 2nd dimension of time?
The short answer: We simply don’t know. This question is a bit more complicated than talking about different spacial dimensions because we experience 3 dimensions of space, and so we can use what we know about life in one dimension (and how it changes when you have two dimensions) to make inferences about what 4 or more dimensions would be like. But it would be extremely difficult to imagine how things behave in 2 or 3 dimensions if we lived in a one dimensional universe (we would have nothing upon which to base our inferences). Model describes universe with no big bang, no beginning, and no end. (PhysOrg.com) -- By suggesting that mass, time, and length can be converted into one another as the universe evolves, Wun-Yi Shu has proposed a new class of cosmological models that may fit observations of the universe better than the current big bang model.
What this means specifically is that the new models might explain the increasing acceleration of the universe without relying on a cosmological constant such as dark energy, as well as solve or eliminate other cosmological dilemmas such as the flatness problem and the horizon problem. Shu, an associate professor at National Tsing Hua University in Taiwan, explains in a study posted at arXiv.org that the new models emerge from a new perspective of some of the most basic entities: time, space, mass, and length.
From Quarks to Quasars. An 'alternative universe' will eventually destroy ours, says Higgs researcher. Nope. This theory is actually based on much more concrete evidence than that. It's based on very carefully measured properties of very real particles, which definitely exist. Those numbers are put into a theory which has, so far, accurately predicted not only the behavior, but the existence of every fundamental particle that we've discovered. When the Higgs (a real, not theoretical particle) was discovered, it's carefully measured properties were also included in the calculation. Facebook. Physicists Discover Geometry Underlying Particle Physics.
Light completely stopped for a record-breaking minute - physics-math - 25 July 2013. Scientists ‘freeze’ light for an entire minute. The Search for Antimatter. Timeline Photos. Where does the Standard Model of physics come from? Your Mass is NOT from Higgs Boson. How Special Relativity Makes Magnets Work. Quantum Levitation. The Feynman Lectures on Physics. Watch a series of seven brilliant lectures by Richard Feynman. 110, 213001 (2013): Hydrogen Atoms under Magnification: Direct Observation of the Nodal Structure of Stark States. The First Image Ever of a Hydrogen Atom's Orbital Structure.
Acoustic Levitation Video Shows Liquid Droplets Floating On Sound Waves In Midair. Hunting the Higgs Now Playing: CERN live webcast. Higgs Hiccup: Contradictory Results Show Up at LHC. What Today's Higgs Boson Discovery Really Means. Physicists reveal compelling evidence for the "God Particle" Did they really detect the Higgs Boson? What is the Higgs boson and why does it matter? - physics-math - 13 December 2011. Physics News, Videos, Reviews and Gossip - io9. Watch a Livestream of the Higgs Boson Announcement Tonight. Physicists Say They Have Found a Higgs Boson. Facebook. A Bicycle Can Be Self-Stable Without Gyroscopic or Caster Effects. [1206.6809] New Dark Matter Detectors using DNA for Nanometer Tracking. Revolutionary 'DNA Tracking Chamber' Could Detect Dark Matter Physicists make new form of matter.