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Sub-Topics Dimensions M-Theory Quantum Gravity String Theory Also Try Particle Physics Relativity Universe Lists Quantum Mechanics (Google) Provides hundreds of sources of information in quantum mechanics. 9-01 News -12-11-05 Graphite Reveals Quantum Effects (Scientific American) "Geim's team found that they [graphenes] do not slow down, even at very low temperatures. In essence, the electrons act as if they have no mass, or no 'rest mass,' to use the more precise phrase from special relativity. It also means that graphite--at least the two-dimensional variety--never stops conducting. Dubbing these pseudo-relativistic particles 'massless Dirac fermions,' the researchers also proved that they travel far faster than electrons in other semiconductors." 12-05 Secret of Levitation Discovered (Yahoo News) "Scientists have discovered a ground-breaking way of levitating ultra small objects, which may revolutionise the design of micro-machines, a new report says." "Physicists said they can create "incredible levitation effects" by manipulating so-called Casimir force, which normally causes objects to stick together by quantum force." 08-07 Papers Planck Scale (Wikipedia.org) "The Planck units are often semi-humorously referred to by physicists as 'God's units'. They eliminate anthropocentric arbitrariness from the system of units: some physicists believe that an extra-terrestrial intelligence might be expected to use the same system." "At the 'Planck scales' in length, time, density, or temperature, one must consider both the effects of quantum mechanics and general relativity. Unfortunately this requires a theory of quantum gravity which does not yet exist." "Most of the Planck units are either too small or too large for practical use, unless prefixed with large powers of ten." 01-06 Quantum Computers (Nature - Ball) Explains an attempt to develop computers that operate at the quantum physics level. College Level. 5-01 Quantum Mechanics (Virginia Tech) Defines the terms and provides examples. "In chemistry we are mostly interested in the electrons that give atoms their properties and hold atoms together to form molecules. Thus to describe matter, and to predict the properties of molecules, we must use quantum mechanics." "Classical mechanics does not provide an accurate description of matter on the scale of atoms and molecules. Electrons around a nucleus or nuclei do not behave like planets orbiting the sun or like ping-pong balls bouncing around in a container. Experiments show that when observing the properties of very small bits of matter, such as a single electron, the matter exhibits wave-like properties. Quantum mechanics is the mathematical description of matter on the atomic scale." 12-02 Quantum Mechanics (Wikipedia.org) "Quantum mechanics is a physical theory which, for very small objects such as atoms, produces results that are very different and much more accurate than those of classical mechanics. It is the underlying framework of many fields of physics and chemistry, including condensed matter physics, quantum chemistry, and particle physics." 10-04 Quantum Mechanics (Wikipedia.org) Provides 99 articles. 10-04 Quantum Mechanics (Wikipedia.org) "Quantum mechanics is a fundamental physical theory that replaces Newtonian mechanics and classical electromagnetism at the atomic and subatomic levels and is the underlying framework of many fields of physics and chemistry, including condensed matter physics, quantum chemistry, and particle physics. Along with general relativity, it is one of the pillars of modern physics." 01-06 Quantum Mechanics - An Example (Virginia Tech) "A simple case to illustrate quantum mechanics is to consider a particle in a one-dimensional box." 12-02 Quantum Mechanics News (Nature - Ball) Provides the results of a recent study to view decoherence, the process by which two or more results of an event are narrowed to one at the atomic level. The whole issue violates common sense. In quantum mechanics, a cat could simultaneously be killed by an event and not killed by the event--both realities can occur simultaneously and then one of the results "melts" into non-existance. 1-00 Superstrings (Pierre) Provides an introduction to superstrings, a unified theory of the universe. Teleportation Successful (Scientific American) "Scientists report today in the journal Nature that they have successfully teleported photons more than 600 meters across the famous waterway." "The results indicate that quantum teleportation is feasible over long distances and under real-world conditions, the scientists say. 'Our result,' they write, 'is a step towards the implementation of a quantum repeater, which will enable pure entanglement to be shared between distant parties in a public environment and eventually on worldwide scale.' " 8-04 Witten, Edward - Profile (BBC News) Known for his contributions to the "Theory of Everything" which ties quantum mechanics, the world of the very small to relativity, the world of the very large. His contributions to superstring theory is particularly noted. He has achieved "the highest honour that a mathematician can receive, namely a Fields Medal." 11-03

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