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  Quantum mechanics - Wikipedia, the free encyclopedia
Quantum mechanics is a more fundamental theory than Newtonian mechanics and classical electromagnetism, in the sense that it provides accurate and precise descriptions for many phenomena that these "classical" theories simply cannot explain on the atomic and subatomic level.
For instance, the well-known model of the quantum harmonic oscillator uses an explicitly non-relativistic expression for the kinetic energy of the oscillator, and is thus a quantum version of the classical harmonic oscillator.
Quantum electrodynamics is a quantum theory of electrons, positrons, and the electromagnetic field, and served as a role model for subsequent quantum field theories.
en.wikipedia.org /wiki/Quantum_mechanics   (5673 words)

 Quantum - Wikipedia, the free encyclopedia
For instance, a "light quantum", being a unit of light (that is, a photon).
Usually referred to as quantum "mechanics", it is regarded by virtually every professional physicist as the most fundamental framework we have for understanding and describing nature, for the very practical reason that it works.
Quantum theory, the branch of physics based on quantization, began in 1900 when Max Planck published his theory explaining the emission spectrum of fl bodies.
en.wikipedia.org /wiki/Quantum   (1354 words)

 quantum theory. The Columbia Encyclopedia, Sixth Edition. 2001-05
Aspects of the quantum theory have provoked vigorous philosophical debates concerning, for example, the uncertainty principle and the statistical nature of all the predictions of the theory.
Quantum mechanics, the final mathematical formulation of the quantum theory, was developed during the 1920s.
Quantum mechanics was combined with the theory of relativity in the formulation of P. Dirac (1928), which, in addition, predicted the existence of antiparticles.
www.bartleby.com /65/qu/quantumt.html   (795 words)

 Quantum Physics
A physicist looking at the box does not know whether the quantum process has broken the capsule or not, so he describes it with a quantum state, that is to say a wave function in which the process has part broken the cyanide capsule, and part not.
Quantum mechanics predicts that the choice of the axis for the first measurement of spin will alter the results of measurement of spin of the second particle, in a manner which is not consistent with the notion that the two particles have separated and become independent.
Quantum mechanics seems to contradict the idea that, prior to measurement, a particle is a point-like object with an unknown position, and appears to say that the particle is actually a wave spread over space.
www.kheper.net /cosmos/quantum_physics/quantum_physics.htm   (3060 words)

 Quantum Philosophy
Reflecting on quantum mechanics some 60 years ago, the British physicist Sir Arthur Eddington complained that the theory made as much sense as Lewis Carroll's poem "Jabberwocky" in which "slithy toves did gyre and gimble in the wabe." Unfortunately, the jargon of quantum mechanics is rather less lively.
An unobserved quantum entity is said to exist in a "coherent superposition" of all the possible "states" permitted by its "wave function." But as soon as an observer makes a measurement capable of distinguishing between these states the wave function "collapses", and the entity is forced into a single state.
But quantum mechanics dictates that after one hour, if no one has looked in the box, the radioactive lump and so the cat exist in a superposition of indistinguishable states; the former is both decayed and undecayed, and the latter is both hungry and full.
www.fortunecity.com /emachines/e11/86/qphil.html   (6058 words)

 Quantum Translations - Home
Founded in 1991, Quantum Inc. is a multi-lingual and mulit-faceted language services company, providing superior foreign language services including face-to-face and over-the-phone interpreters, written translations and transcriptions in all languages and all fields of expertise.
Quantum has a proven record of providing more than 150 languages with the highest quality performance, affordability, and superior customer service.
Quantum’s staff delivers day or night because communication is 24 hours a day, 7 days a week for a fast-paced response.
www.quantumtranslations.com   (184 words)

 Schrodinger's Machines
However, in spite of the fact that the origins of the quantum theory stretch back nearly a century, it is only in recent years that the general public has become aware of the subject.
Then in the 1970s, a number of writers recognized that the deep philosophical implications of quantum mechanics would be of considerable interest to the wider public, especially as some of the quantum mechanical concepts were of a mystical flavor.
Indeed, all quantum systems essentially exploit the fact that the quantum microworld has no single, well-defined reality, but is a ghostly amalgam of alternative universes, a hybrid world in which possible realities merge and overlap to produce a final observed actuality.
www.physics.uq.edu.au /people/milburn/books/Schr_Mach.html   (1131 words)

 Quantum Chaos
The quantum analogue of the humble pendulum is the laser; the flying cannonballs of the atomic world consist of beams of protons or electrons, and the rotating wheel is the spinning electron (the basis of magnetic tapes).
The quantum barriers are formed by the outer layers of the sandwich, which gives the electrons a couple of straight edges to bounce back and forth between, The other edges of the table are created by the restraining effect of the magnetic field, which curves the electron motion in a complicated way.
Quantum regularity was lingering in the chaos rather like the smile of the Cheshire cat in Alice's adventures in wonderland.
www.dhushara.com /book/quantcos/qchao/quantc.htm   (7426 words)

 An introduction to Quantum Computing
The simulation of a quantum computer on a classical one is a computationally hard problem because the correlations among quantum bits are qualitatively different from correlations among classical bits, as first explained by John Bell.
The answer is primarily those errors that arise as a direct result of decoherence, or the tendency of a quantum computer to decay from a given quantum state into an incoherent state as it interacts, or entangles, with the state of the environment.
Quantum hardware, on the other hand, remains an emerging field, but the work done thus far suggests that it will only be a matter time before we have devices large enough to test Shor's and other quantum algorithms.
www.cs.caltech.edu /~westside/quantum-intro.html   (3038 words)

 Low-Level Formatting: Quantum Drives
Quantum advise that attempting to properly Low-Level Format your Quantum hard drive will void any existing manufacturer's warranty, and recommend that drives be returned to the manufacturer for any required Low-Level Formatting.
Quantum say this is because "most drives in use today are newer than 2.5 years old".
See the section on the main page to use FDISK if your Quantum hard drive is not S.M.A.R.T. capable, you have a bad virus infection, you know the drive is out of warranty, or if you have bad sectors that need to be mapped out.
www.ameriwebs.net /groupworks/george/quantum.htm   (465 words)

Chukanovenergy.com will be limited in information about Quantum Free Energy research and practice for an undetermined period of time.  Thank you for all of your support and interest in the possibilites of quantum energy.  You will still be able to order books located in the "learning" section, please contact webmaster or kiril@chukanovenergy.com.  Thank you.
General Quantum Mechanics is not a continuation or improvement of contemporary Quantum Mechanics.  It is a totally new Fundamental Science.  GQM is a theory of Everything explaining our world in all of its aspects.
Quantum Free Energy is an unlimited source of high quality free energy.  QFE has no alternatives in the Field of Free Energy Sources.  QFE has multiple applications including: unlimited source of inexpensive and safe energy for everyday needs; gama-lasers; nano-technology applications; very powerful and compact particle accelerators.
www.chukanovenergy.com   (717 words)

 Quantum Reality
Quantum Mechanics is a probability calculus which can be applied to a specific combination of measuring devices and quantum system.
Quantum Mechanics is consistent with the classical approach with one significant nuance: the result of any measurement is always regarded as 100% accurate.
Quantum Mechanics is just a probability calculus which can be applied to a specific combination of measuring devices and quantum system.
www.quantum.bowmain.com /Quantum_Reality.htm   (10262 words)

 Quantum Mechanics
In quantum mechanical contexts, the term ‘observable’ is used interchangeably with ‘physical quantity’, and should be treated as a technical term with the same meaning.
In standard texts on quantum mechanics, the vector is represented by a function known as the wave-function, or ψ-function.
From a mathematical point of view, what really distinguishes quantum mechanics from its classical predecessors is that states and quantities have a richer structure; they form families with a more interesting network of relations among their members.
plato.stanford.edu /entries/qm   (3833 words)

 The Quantum Project   (Site not responding. Last check: 2007-11-05)
The main objective of the Quantum project is the continuation of this stable IP network service but at access capacities up to 155 Mbps.
An important element of the Quantum project is to trial the new protocols and technology developments both in a test and a wide area network environment with view to deploying them in the operational TEN-155 service at a later stage.
The Quantum Project is co-funded under the Telematics Applications, Esprit and ACTS Programmes of the European Commission.
archive.dante.net /quantum.html   (317 words)

 fUSION Anomaly. Quantum Mechanics
quantum mechanics or quantum theory, branch of mathematical physics that deals with the emission and absorption of energy by matter and with the motion of material particles.
According to the quantum theory, energy is emitted and absorbed in a small packet, called a quantum (pl. quanta), which in some situations behaves as particles of matter do; particles exhibit certain wavelike properties when in motion and are no longer viewed as localized in a given region but as spread out to some degree.
Quantum mechanics was combined with the theory of relativity in the formulation of P.A.M. DIRAC (1928), which also predicted the existence of ANTIPARTICLES.
fusionanomaly.net /quantummechanics.html   (1928 words)

 Physics 219 Course Information
Quantum Computation and Quantum Information by Michael Nielsen and Isaac Chuang, will be available in the fall of 2000.
Therefore, since the physical world is fundamentally quantum mechanical, the foundations of information theory and computer science should be sought in quantum physics.
A quantum computer will be much more vulnerable than a conventional digital computer to the effects of noise and of imperfections in the machine.
www.theory.caltech.edu /people/preskill/ph229   (1043 words)

 What is Quantum Physics
Quantum physics is a branch of science that deals with discrete, indivisible units of energy called quanta as described by the Quantum Theory.
The only way quantum physics could be true is if the particles could communicate faster then the speed of light, which Einstein reasoned would be impossible because of his Theory of Relativity.
Ironically, Einstein gave quantum theory the push it needed to become the valid theory it is today, though he would spend the rest of his lift trying to prove that it was not a true description of nature.
library.thinkquest.org /3487/qp.html   (4375 words)

 Quantum Marine Engineering yacht stabilizers, thrusters and systems
Quantum Marine Engineering, home of ZeroSpeed™ and OnAnchor™ yacht stabilizers for roll control at anchor manufactures, supplies, and services hydraulic equipment for the world's finest yachts and builders.
Quantum products include the ARCHER™ ride control system for high speed yachts- full roll, pitch, and trim control over a wide range of speeds; and the revolutionary MAGLIFT™ rotary stabilizer, for zero drag at speed and maximum stability while at anchor, drifting, or low speed travel.
Quantum, in conjunction with Island Engineering, supplied T-foils and interceptors for the Navy's new X-Craft, the Sea Fighter; and has presented MAGLIFT™ as a stability and ride control solution for new Navy vessels.
www.quantumhydraulic.com   (324 words)

 Todd's Quantum Intro   (Site not responding. Last check: 2007-11-05)
Simply put, quantum mechanics is the study of matter and radiation at an atomic level.
Quantum mechanics, however, says that there is a small probability that the ball could go right through the wall (without damaging the wall) and continue its flight on the other side!
Spin is a completely quantum mechanical property of a particle and cannot be explained in any way by classical physics.
www.hi.is /~hj/QuantumMechanics/quantum.html   (2242 words)

 CQC Intros: Quantum Computing   (Site not responding. Last check: 2007-11-05)
On the atomic scale matter obeys the rules of quantum mechanics, which are quite different from the classical rules that determine the properties of conventional logic gates.
A quantum logic gate, like a classical gate, is a very simple computing device that performs one elementary quantum operation, usually on two qubits, in a given period of time[4].
The quantum theory of computation must in any case be an integral part of the world view of anyone who seeks a fundamental understanding of the quantum theory and the processing of information.
www.qubit.org /library/intros/comp/comp.html   (2952 words)

 Technorati Tag: quantum
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Quantum Tape Drives, Libraries and Disk New and refurbished Quantum tape drives and libraries.
Quantum Theory for High School, College Award-winning physics e-book with interactive lessons, movies and problems.
www.technorati.com /tag/quantum   (478 words)

 The QUANTUM Project
The QUANTUM project followed on from the successful TEN-34 project and was operational between October 1998 and November 2000.
An important element of the QUANTUM project was to trial the new protocols and technology developments both in a test and a wide area network environment with the aim of deploying them in the operational TEN-155 service at a later stage.
QUANTUM was a Research & Development Project co-ordinated by DANTE and supported by the European Commission.
archive.dante.net /quantum   (400 words)

 What is Quantum Physics?
The quantum model of the atom is much more complex than the traditional model, so most teachers save that stuff for college.
What quantum physics does is give us the statistical probability of the electron's location at any one moment.
Quantum physics even plays a part in flholes, where regular physics is thrown out the window and then some!
www.jracademy.com /~jtucek/science/what.html   (543 words)

 Data Backup Systems - Data Backup Solutions
Quantum offers businesses of all sizes an unparalleled range of solutions, from leading tape drives and media technologies, autoloaders and libraries to disk-based backup systems.
Quantum's innovative GoVault drive is secure and reliable and has all of the flexibility of removable media in a fast, tough, disk solution
Quantum’s full line of storage media, including DLTtape, LTO Ultrium, DAT/DDS and Travan technologies, are designed to ensure that your valuable data is protected
www.quantum.com /Products/Index.aspx   (186 words)

 SPSS - Quantum - Desktop survey tabulation   (Site not responding. Last check: 2007-11-05)
Quantum is a powerful tabulation tool that helps you clean and validate your data and create useful tables—quickly.
Quantum's editing features enable you to quickly assess and improve the quality of your data.
Quantum is the only tabulation tool that offers direct integration with Quanvert.
www.spss.com /quantum   (282 words)

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