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QuantumA quantum is the smallest increment into which many physical properties are subdivided.
Most commonly, quanta are the fundamental units of something measurable. Energy, for example, is quantized into photons, wavelike packets of fixed frequency. Quantum physics was founded at the beginning of the twentieth century, incorporating at a foundational level the idea that electromagnetic radiation comes in such packets; the concepts of quantum theory have proved paradoxical, and difficult to articulate in any familiar terms, but the theory built up into quantum field theory was the largest single step in the physical sciences between 1900 and 1950.
Etymology
The word quantum comes from the Latin word for "quantity".
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Quantum Physics Online
A series of Java applets illustrating solutions to basic problems in this subject.
http://www.quantum-physics.polytechnique.fr/en/index.html
Student Understanding of Quantum Mechanics
A set of lectures and reports outlining methods of teaching introductory quantum mechanics to a wide range of students.
http://www.physics.umd.edu/rgroups/ripe/perg/qm/
Eurotechnology Japan: Quantum Device Simulations
Visualization and simulation of electron waves propagating through quantum device structures demonstrating solutions to the time-dependent Schroedinger equation
http://www.eurotechnology.com/schroedinger/
Parity
An overview of Parity in quantum mechanics and of the ways to break quantum mechanical symmetry.
http://www2.slac.stanford.edu/vvc/theory/parity.html
Quantum Cryptography in Norway
Application-oriented research at NTNU, Trondheim and Telenor, Oslo
http://www.fysel.ntnu.no/Optics/qcr/
Superconducting Quantum Interference Devices
A look at Squids, the theory and applications
http://www.ug-home.nottingham.ac.uk/~ppyttch
Encyclopedia.com - Quantum Theory
Includes a basic introduction to what this theory is, and links to relevant journal and magazine articles.
http://www.encyclopedia.com/html/q/quantumt.asp
Quantum and Foundational Physics (A. Zeilinger)
The website of the group around Prof. Zeilinger working at the university of Vienna in the field of Quantum Physics.
http://www.quantum.univie.ac.at/
An introduction to Quantized Lie Groups and Algebras
We give a selfcontained introduction to the theory of quantum groups according to Drinfeld highlighting the formal aspects as well as the applications to the Yang-Baxter equation and representation theory. Introductions to Hopf algebras, Poisson structures and deformation quantization are also provided.
http://arxiv.org/abs/hep-th/9111043
Topics in Modern Quantum Optics
This is the written version of lectures presented at the 17th Symposium on Theoretical Physics covering various topics in quantum optics.
http://arxiv.org/abs/quant-ph/9909086
Quantum Cryptography
A recent overview of quantum cryptography.
http://arxiv.org/abs/quant-ph/0101098
Path Integral Methods and Applications
These lectures are intended as an introduction to the technique of path integrals and their applications in physics. The audience is mainly first-year graduate students, and it is assumed that the reader has a good foundation in quantum mechanics.
http://arxiv.org/abs/quant-ph/0004090
Quantum Experiments and the Foundations of Physics
Information about experiments performed in Austria.
http://www.quantum.univie.ac.at/research/photonentangle/
Path Integral Approach to Quantum Mechanics
An intuitive description of Feynman's version of quantum mechanics written in poetic language.
http://www.jupiterscientific.org/science/baeparts/qm2345.html
Introduction to the Basics of Dephasing
A qualitative introduction to the process by which quantum-mechanical interference effects get destroyed through the random influences of the environment. Includes Java simulation of a dissipative bath.
http://iff.physik.unibas.ch/~florian/dephasing/dephasing.html
Grains of Mystery
A primer for the non-professional interested in learning about the principles of quantum physics without all the math.
http://www.symonds.net/~deep/stuff/qp/
Quantum Lynx
A collection of quantum mechanic's related sites, with a few metaphysical sites as well.
http://www.geocities.com/SoHo/Coffeehouse/6831/qlynx.html
Interacting Boson Model, A Free Publication
An Introduction to the Interacting Boson Model of the Atomic Nucleus, by Walter Pfeifer. Electronic publication/book. 35 line figures, 181 pages. 1998. Currently this can be downloaded as a pdf file for free.
http://homepage.swissonline.ch/pfeifer_w
Intro to Quantum Mechanics
This page is intended to give an ordinary person a brief overview of the importance and wonder of quantum mechanics.
http://www-theory.chem.washington.edu/~trstedl/quantum/quantum.html
Quantum Information Dynamics
An overview of work done at Caltech on quantum information dynamics - the study of quantum Information Theory and its application to processes involving the interaction of qubits: the quantum carriers of information
http://www.krl.caltech.edu/~adami/quantum.html
Physics Bookshelf - Quantum Mechanics
A collection of articles explaining basic concepts in quantum mechanics.
http://www.upscale.utoronto.ca/GeneralInterest/QM.html
What is Quantum Physics?
History and explanation of quantum physics / quantum mechanics.
http://www.jracademy.com/%7ejtucek/science/what.html
Quantum Physics
A qualitative description of the key aspects, including Heisenburg's Uncertainty Principle, wave-particle duality and related theories.
http://www.hpwt.de/Quantene.htm
Virtual Journal Of Quantum Information
This monthly virtual journal contains articles that have appeared in one of the participating source journals and that fall within a number of contemporary topical areas in quantum information.
http://www.vjquantuminfo.org
Quantum Optics and Foundation of Physics
Pages and Links about Quantum Optics. Created by the group around Anton Zeilinger in Vienna.
http://www.quantum.at/
The EPR Paradox and Inequality Principle of Bell
A short article from the USENET Physics FAQ.
http://math.ucr.edu/home/baez/physics/Quantum/bells_inequality.html
Quantum and Braided Spin
The modern Kaluza-Klein theories of unification of gauge fields and gravitation, the theories of grand unification and, more recently, superfield, super-string, membrane and conformal field theories have enhanced the role of the geometry of multidimensional spaces in fundamental theoretical physics. An analagous quantum geometry is explored in these online lectures.
http://kaluza.physik.uni-konstanz.de/2MS/rosenb/rb/node1.html
Quantum Chaos
An essay on the effects Chaos theory would have on traditional quantum mechanics.
http://www.scitec.auckland.ac.nz/~king/Preprints/book/quantcos/qchao/quantc.htm
Quantum Mechanics
A survey of quantum mechanics from the Stanford Encyclopedia of Philosophy.
http://plato.stanford.edu/entries/qm/
Virtual Partical FAQ
This site answers questions about virtual particles.
http://www.geocities.com/capecanaveral/hangar/6929/Part-virtualiFAQ.html
Fermions and Bosons
A set of notes on fermions and bosons, including a review of angular momentum in quantum mechanics.
http://www.physics.nmt.edu/~raymond/classes/ph13xbook/node199.html
Quantum Communication
A short introduction titled "Quantum communication moves into the unknown" by David Deutsch and Artur Ekert.
http://eve.physics.ox.ac.uk/NewWeb/Research/communication/communication.html
Quantum Physics Primer
Describes some basic concepts of quantum physics.
http://theory.uwinnipeg.ca/physics/quant/node1.html
Teaching Symmetry in Introductory Physics
Modern physics is largely defined by fundamental symmetry principles and Noether's Theorem. It requires little more than high school algebra to understand and manipulate these concepts. We prescribe a symmetry module to insert into the curriculum, of a few weeks length.
http://www.emmynoether.com/
The Quantum World
Review and discussion of implications of quantum theory, popular article written by a physicist.
http://www.users.totalise.co.uk/~idmon/index.htm
QMvideos
Article which teaches the basics of quantum mechanics with help of digital videos showing the time evolution of wave packets in various potentials, with interference, tunneling.
http://rugth30.phys.rug.nl/quantummechanics/
100th Anniversary Of Quantum Theory
A scientific article about a new approach in quantum theory.
http://cust.idl.com.au/rubbo/quantum
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