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Pioneering Physicist John Wheeler Dies at 96 Editor's Note: Yesterday morning, renowned physicist John Archibald Wheeler died of pneumonia. He was an iconic figure: a veteran of the Manhattan Project, a pioneer of the search for a quantum theory of gravity, and an originator of such evocative terms as "black hole." Most physics students know him as co-author of the standard textbook on Einstein's general theory of relativity—a tome that defies almost every stereotype of a textbook, much as Wheeler's own career defied almost every generalization. Physicists Discover Geometry Underlying Particle Physics Physicists have discovered a jewel-like geometric object that dramatically simplifies calculations of particle interactions and challenges the notion that space and time are fundamental components of reality. “This is completely new and very much simpler than anything that has been done before,” said Andrew Hodges, a mathematical physicist at Oxford University who has been following the work. The revelation that particle interactions, the most basic events in nature, may be consequences of geometry significantly advances a decades-long effort to reformulate quantum field theory, the body of laws describing elementary particles and their interactions. Interactions that were previously calculated with mathematical formulas thousands of terms long can now be described by computing the volume of the corresponding jewel-like “amplituhedron,” which yields an equivalent one-term expression. Locality is the notion that particles can interact only from adjoining positions in space and time.

Glossary of BitTorrent terms Glossary[edit] Availability[edit] (Also known as distributed copies.) The number of full copies of a file (or set of files and directories) directly available to the client. Each seed adds 1.0 to this number, as they have one complete copy of the file. August 26, 2014: Do we live in a 2-D hologram? Press Release August 26, 2014 Do we live in a 2-D hologram? Pauli exclusion principle A more rigorous statement is that the total wave function for two identical fermions is antisymmetric with respect to exchange of the particles. This means that the wave function changes its sign if the space and spin co-ordinates of any two particles are interchanged. Particles with an integer spin, or bosons, are not subject to the Pauli exclusion principle: any number of identical bosons can occupy the same quantum state, as with, for instance, photons produced by a laser and Bose–Einstein condensate. Overview[edit]

Ten Lessons from the Standard Model - The Nature of Reality — The Nature of Reality The most recent Nobel Prize in physics, awarded to Francois Englert and Peter Higgs for the prediction of the Higgs boson, marks the apotheosis of the Standard Model in two ways. First, the Higgs particle is a milestone in itself: It is the last ingredient required to complete the Standard Model. But second, and more profoundly, the discovery process bore witness to the extraordinary power of the Standard Model. Higgs particles are rare and fleeting visitors to our world.

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.

100 Websites You Should Know and Use (updated!) Entertainment Meet David Peterson, who developed Dothraki for Game of Thrones There are seven different words in Dothraki for striking another person with a sword. Physical Review X Does Research on Foundations of Quantum Mechanics Fit into PRX’s Scope? October 24, 2014 The editors and Bill Poirier from Texas Tech University spotlight an original, thought-provoking paper by Hall, Deckert, and Wiseman on foundations of quantum mechanics, Phys.

Astronomers discover closest potentially habitable planet: Wolf 1061c The closest potentially habitable planet ever found has been spotted by Australian scientists, and it's just 14 light-years away. That’s 126 trillion kilometres from Earth, which sounds impossibly far, but when you consider that our closest planetary neighbour, Mars, is 249 million km away, that handful of light-years doesn’t seem so bad in the scheme of things. Named Wolf 1061c, the newly discovered planet is located in the constellation Ophiucus, and its star is the 35th closest star from Earth - that we know about. The team behind the discovery says it's orbiting a red dwarf 'M-type' star called Wolf 1061, alongside two other planets.

Mathematicians Chase Moonshine, String Theory Connections In 1978, the mathematician John McKay noticed what seemed like an odd coincidence. He had been studying the different ways of representing the structure of a mysterious entity called the monster group, a gargantuan algebraic object that, mathematicians believed, captured a new kind of symmetry. Mathematicians weren’t sure that the monster group actually existed, but they knew that if it did exist, it acted in special ways in particular dimensions, the first two of which were 1 and 196,883. McKay, of Concordia University in Montreal, happened to pick up a mathematics paper in a completely different field, involving something called the j-function, one of the most fundamental objects in number theory.

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