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How deep does the asymmetry between matter and antimatter go? Each type of particle (electrons, protons, etc.) have antimatter partners: positrons, antiprotons, and so forth. These antiparticles have an opposite electric charge (unless they're neutral), but otherwise behave much like their matter counterparts.
In February 2012, the Nobel Prize-winning physicist Frank Wilczek decided to go public with a strange and, he worried, somewhat embarrassing idea.
Quantum mechanics is, mathematically, quite simple. But it has implications that require people to think differently about the world. One particularly hard-to-grasp idea is that, on the surface, some knowledge precludes obtaining other knowledge.
One of the fundamental ideas in physics is the existence of broken symmetries. One famous broken symmetry is the Higgs mechanism, which leads to the prediction of one or more Higgs bosons. In materials, broken symmetries of different sorts lead to magnetism, superconductivity—and a bit of strange behavior that has puzzled physicists for three decades.
Nothing is colder than absolute zero, so it seems nonsensical to talk about negative temperature – but now there is a substance that must have just that.
Dec. 19, 2012 — A carbon-nanotube-coated lens that converts light to sound can focus high-pressure sound waves to finer points than ever before.
Dec. 21, 2012 — Forget solid, liquid, and gas: there are in fact more than 500 phases of matter.
At the nano level, researchers at Stanford have discovered a new way to weld together meshes of tiny wires. Their work could lead to innovative electronics and solar applications.
The quantum Internet is a term that has been bandied about a lot recently.
Nov. 26, 2012 — The quest to harness a broader spectrum of sunlight's energy to produce electricity has taken a radically new turn, with the proposal of a "solar energy funnel" that takes advantage of materials under elastic strain.
Nov. 19, 2012 — A new approach to invisibility cloaking may one day be used at sea to shield floating objects -- such as oil rigs and ships -- from rough waves.
Nov. 19, 2012 — The structure of the universe and the laws that govern its growth may be more similar than previously thought to the structure and growth of the human brain and other complex networks, such as the Internet or a social network of trust relationships between people, according to a new paper published in the science journal Nature's Scientific Reports .
At extremely cold temperatures, the quantum nature of matter expresses itself in unique collective behaviors. These include superconductivity, superfluidity, and Bose-Einstein condensation, where collections of particles act as a single quantum system. Most of these dramatic effects have been achieved with collections of atoms.
Public release date: 7-Nov-2012 [ Print | E-mail | Share ] [ Close Window ]
(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.