21. Quantum Theory At University Of Potsdam Upcoming Meetings. (tba) Member Groups. quantum theory Group, Potsdam (M. Wilkens)(managing node). Quantum Information Theory Group, TU Berlin (KE Hellwig). http://www.quantum.physik.uni-potsdam.de/A2/

Am Neuen Palais 10 14469 Potsdam Welcome to the home page of the A2 Quantum Information Consortium, a network of research groups conducting theoretical research in quantum information processing. Upcoming Meetings (tba) Member Groups Quantum Theory Group , Potsdam (M. Wilkens) (managing node). Theoretical Quantum Optics Group , Hannover (M. Lewenstein). , Hannover (W. Mathis) Institute for Mathematical Physics , Braunschweig (R. F. Werner). Quantum Information Theory Group , TU Berlin (K.-E. Hellwig). AG Information and Complexity , Bielefeld (R. Ahlswede). Quantum Information Processing Group , Clausthal (J.-D. Hennig). Individual members and member groups in detail The "A2" in the name of the network stands for the motorway connecting the cities of Bielefeld - Hannover - Braunschweig - Magdeburg - Potsdam - Berlin. We have installed a joint seminar - the so-called "quantum szwantum seminar" - which is held approximately once a month (starting from November 1998). Date, place, and program of the meetings can be found here: Past Meetings Monday, Nov 16, 1998, 13:00, University of Potsdam

22. Quantum Theory And Wave/Particle Duality quantum theory and Wave/Particle Duality. A So how does this Fourierpattern in the scattering momentum relate to quantum theory? The http://www.hotquanta.com/wpd.html

Quantum Theory and Wave/Particle Duality A work in Progress; modified: 7-March-2001 Many interpretations of quantum physics incorporate the idea that particles (or some property associated with particles) propagate as waves. The object of this article is to examine the core assumptions behind this wave/particle idea with a view to developing a different model that is consistent with relativity, observation and the mathematical formalism. John K. N. Murphy , Kohimarama, Auckland, New Zealand. Home Page Site Index About MySelf Sign Guestbook ... View Guestbook Contents Comments and feedback welcome - E- Mail John Murphy 1.0 Introduction 1.1 Basic Issues 1.2 Generating a New Approach ... 5.0 The Ahranhov-Bohm Effect 1.0 Introduction Next Essentially, wave/particle duality employs the notion that an entity simultaneously possesses localized (particle) and distributed (wave) properties. The idea has been introduced into modern physics to account for observations in which particles of matter interact to produce effects that appear to be identical to the effects that occur when waves diffract and interfere. However, the concept of rests on an assumption. It is assumed that wave propagation mechanisms can provide the only possible explanation for scattering effects observed in experiments such as the Twin Slit experiment.

23. M-theory, The Theory Formerly Known As Strings The theory formerly known as strings is presented in a nontechnical formatCategory Science Physics Quantum Field Theory Superstrings...... But since we cannot build a consistent quantum theory from GR, several puzzleswere raised concerning the microscopic physics of black holes. http://www.damtp.cam.ac.uk/user/gr/public/qg_ss.html

M-theory, the theory formerly known as Strings The Standard Model In the standard model of particle physics, particles are considered to be points moving through space, tracing out a line called the World Line. To take into account the different interactions observed in Nature one has to provide particles with more degrees of freedom then only their position and velocity, such as mass, electric charge, color (which is the "charge" associated with the strong interaction) or spin. String Theory In String Theory, the myriad of particle types is replaced by a single fundamental building block, a `string'. These strings can be closed, like loops, or open, like a hair. As the string moves through time it traces out a tube or a sheet, according to whether it is closed or open. Furthermore, the string is free to vibrate, and different vibrational modes of the string represent the different particle types, since different modes are seen as different masses or spins. One mode of vibration, or `note', makes the string appear as an electron, another as a photon. There is even a mode describing the graviton, the particle carrying the force of gravity, which is an important reason why String Theory has received so much attention. The point is that we can make sense of the interaction of two gravitons in String theory in a way we could not in QFT. There are no infinities! And gravity is not something we put in by hand. It has to be there in a theory of strings. So, the first great achievement of String Theory was to give a consistent theory of quantum gravity, which resembles GR at macroscopic distances. Moreover String Theory also possesses the necessary degrees of freedom to describe the other interactions! At this point a great hope was created that String Theory would be able to unify all the known forces and particles together into a single `Theory of Everything'.

24. New Scientist | Guide To The Quantum World This was Richard Feynman, speaking about quantum theory. Round the twist Tyingyour shoelaces can entangle you in aspects of quantum theory 10 Nov 01. http://www.newscientist.com/hottopics/quantum/

"Do not take the lecture too seriously . . . just relax and enjoy it. I am going to tell you what nature behaves like. If you will simply admit that maybe she does behave like this, you will find her a delightful, entrancing thing. Do not keep saying to yourself "But how can it be like that?" because you will get...into a blind alley from which nobody has yet escaped. Nobody knows how it can be like that." This was Richard Feynman, speaking about quantum theory. It pays to take his warning seriously. By the time you finish this section of the site, you will understand the most extraordinary implications of a truly extraordinary theory. But if you try to picture it in familiar ways you will come hopelessly unstuck. The quantum world really is different, and the only way to come to grips with it is to suspend disbelief. So open your mind and become a genius in your own lunchtime Subscribe to New Scientist NEW SCIENTIST'S GUIDE TO THE QUANTUM WORLD LATEST ON THE QUANTUM WORLD Triple electron entanglement boosts quantum computing A new semiconductor-based technique for entangling multiple electrons marks a significant step forward 28 Feb 03 Long distance quantum teleportation draws closer Until now, verifying the transmission of information required the quantum link itself to be destroyed, preventing any further use

25. 81: Quantum Theory Introduction. quantum theory study of solutions of the Schrödinger (differential)equation! History. See the article on quantum theory at St Andrews. http://www.math.niu.edu/~rusin/known-math/index/81-XX.html

Search Subject Index MathMap Tour ... Help! ABOUT: Introduction History Related areas Subfields POINTERS: Texts Software Web links Selected topics here 81: Quantum Theory Introduction History See the article on Quantum theory at St Andrews. Applications and related fields Subfields Axiomatics, foundations, philosophy General mathematical topics and methods in quantum theory Groups and algebras in quantum theory General quantum mechanics and problems of quantization Quantum field theory; related classical field theories Scattering theory, see also 47A40 Applications to specific physical systems This is among the largest areas in the Math Reviews database; 81T (Quantum field theory) is among the largest of the 3-digit areas, and 81T13, 81T30, and 81T40 are (each!) among the largest of the 5-digit areas. During 1980-1990 this field was subdivided a little differently, although many of the parts of the earlier and present system correspond (as is corroborated by the diagram): the old 81B is roughly the present 81P, 81C=81Q, 81D=81S, 81E=81T, 81F=81U, and 81G is roughly 81V; the section 81R is distinctly new, and the old sections 81H through 81N (primarily applications of quantum theory to other parts of physics) were dropped. (Prior to 1980, the classification simply mirrored the entire MSC, categorizing papers according the mathematical tools involved.)

26. Quantum Theory encyclopediaEncyclopedia quantum theory. quantum theory, modern physicaltheory concerned with the emission and absorption of energy http://www.factmonster.com/ce6/sci/A0840721.html

Encyclopedia quantum theory quantum theory, modern physical theory concerned with the emission and absorption of energy by matter and with the motion of material particles; the quantum theory and the theory of relativity together form the theoretical basis of modern physics. Just as the theory of relativity assumes importance in the special situation where very large speeds are involved, so the quantum theory is necessary for the special situation where very small quantities are involved, i.e., on the scale of molecules atoms , and elementary particles . 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. Sections in this article: Introduction Relationship of Energy and Matter Dual Nature of Waves and Particles Evolution of Quantum Theory Bibliography quantum field theory Quantz, Johann Joachim AD AD AD AD AD Print this page Cite this page Awards and Press Link to Fact Monster Add Fact Monster search ... Privacy

27. Quantum Theory. The Columbia Encyclopedia, Sixth Edition. 2001 2001. quantum theory. modern According to the quantum theory, energyis held to be emitted and absorbed in tiny, discrete amounts. An http://www.bartleby.com/65/qu/quantumt.html

Select Search All Bartleby.com All Reference Columbia Encyclopedia World History Encyclopedia World Factbook Columbia Gazetteer American Heritage Coll. Dictionary Roget's Thesauri Roget's II: Thesaurus Roget's Int'l Thesaurus Quotations Bartlett's Quotations Columbia Quotations Simpson's Quotations English Usage Modern Usage American English Fowler's King's English Strunk's Style Mencken's Language Cambridge History The King James Bible Oxford Shakespeare Gray's Anatomy Farmer's Cookbook Post's Etiquette Bulfinch's Mythology Frazer's Golden Bough All Verse Anthologies Dickinson, E. Eliot, T.S. Frost, R. Hopkins, G.M. Keats, J. Lawrence, D.H. Masters, E.L. Sandburg, C. Sassoon, S. Whitman, W. Wordsworth, W. Yeats, W.B. All Nonfiction Harvard Classics American Essays Einstein's Relativity Grant, U.S. Roosevelt, T. Wells's History Presidential Inaugurals All Fiction Shelf of Fiction Ghost Stories Short Stories Shaw, G.B. Stein, G. Stevenson, R.L. Wells, H.G. Reference Columbia Encyclopedia PREVIOUS NEXT ... BIBLIOGRAPHIC RECORD The Columbia Encyclopedia, Sixth Edition. quantum theory modern physical theory concerned with the emission and absorption of energy by matter and with the motion of material particles; the quantum theory and the theory of

28. Quantum Resonance Theory A grand unified theory of consciousness, based on mysticism (primarily Kabbalah) and quantum theory. http://www.xmission.com/~mkeener

H OME The Quantum Resonance: A Theory of Life (Matt C. Keener, 1999) alludes to a paradigm of aspects inherent in existence or experience. Quantum resonance theory does not attempt to capture "truth"; rather, the theory is intended to evoke new perspectives on life that will vary from one person to the other as art does. Many doors are left unopened. Others are opened and unentered, while the doors that are opened and entered are passed through very quickly. Some references (such as the Penrose-Hameroff model) are not properly explained, and the theory is esoteric and mystical. Reader be warned. A REVISED ABSTRACT (taken from The Quantum Resonance: Mistakes and Confusions ADDITIONAL DESCRIPTION According to quantum resonance theory, any reality is a virtual reality, whether these be realities of people, plants, supernovas or quantum particles. Each reality is like the dream of a dreamer. Life is a virtual experience. However, quantum resonance theory gets much more complicated. Life is a vast, dynamic network of interconnected virtual realities. Like atoms and the standard model of physics, these virtual realities comprise the basic building blocks of the quantum resonance model. In theory, life is a multilayered and dynamic network of living selves; e.g., consider physiology: body, organs, cells, DNA, and so forth. The quantum resonance manifests as a fractal

29. PhysicsWeb - Quantum Theory: Weird And Wonderful quantum theory weird and wonderful Feature December 1999. Quantum mechanics is agreat deal more than a theory; it is a whole new way of looking at the world. http://physicsweb.org/article/world/12/12/19

Advanced site search physics world January February March April May June July August September October November December Latest issue Subscribe to Physics World Media Information ... Editorial Staff quick search Search Physics World Previous Physics World December 1999 Next Quantum theory: weird and wonderful Feature: December 1999 Quantum mechanics is the most accurate theory we have to describe the world, but there is still much about it that we do not fully understand. Quantum mechanics is a great deal more than a theory; it is a whole new way of looking at the world. When it was developed in the 1920s, quantum mechanics was viewed primarily as a way of making sense of the host of observations at the level of single electrons, atoms or molecules that could not be explained in terms of Newtonian mechanics and Maxwellian electrodynamics. Needless to say, it has been spectacularly successful in this task. Around 75 years later, as we enter the new millennium, most physicists are confident that quantum mechanics is a fundamental and general description of the physical world. Indeed, serious attempts have been made to apply quantum ideas not merely to laboratory-scale inanimate matter but also, for example, to the workings of human consciousness and to the universe as a whole. Yet despite this confidence, the nagging questions that so vexed the founding fathers of quantum theory - and which many of them thought had finally been laid to rest after years of struggle - have refused to go away. Indeed, as we shall see, in many cases these questions have returned to haunt us in even more virulent forms. It is probably fair to say that, in the final years of this century, interest in the foundations of quantum mechanics is more widespread, and more intellectually respectable, than at any time since the invention of quantum theory.

30. A Many-Minds Interpretation Of Quantum Theory Copies of papers in which a technically sophisticated many minds interpretationof quantum theory is developed, together with a brief non technical summary. http://www.poco.phy.cam.ac.uk/~mjd1014/

A Many-Minds Interpretation Of Quantum Theory Matthew J. Donald The Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, Great Britain. e-mail: matthew.donald@phy.cam.ac.uk Many-minds interpretations of quantum theory are many-worlds interpretations in which it is argued that the distinction between worlds should be made at the level of the mind of the individual observer. This site contains copies of a series of papers in which I have developed a technically-sophisticated many-minds interpretation, which gives explicit definitions to the crucial concepts. Thus the physical structure of ``observers'' and their temporal and probabilistic development are explicitly characterized. The theory is compatible with special relativity theory, with quantum field theory, and with the macroscopic and thermal nature of observers. This site also contains a brief (non-technical) summary of the theory, a photograph of the author, and answers to some frequently asked questions ; partly about the form in which the papers are presented and partly about alternative interpretations. Just in case this site isn't really what you were looking for, the FAQ also provides links to some introductory material on the interpretation of quantum theory. I would be very grateful to be informed if anyone has

31. Relativity And Quantum Theory Combining Relativity and quantum theory. Overview. A third use of this numericalapproach to relativistic quantum field theory is more speculative in nature. http://phys.columbia.edu/~cqft/physics.htm

Combining Relativity and Quantum Theory Overview The two major physics discoveries of the first part of this century, quantum mechanics and Einstein's theory of special relativity present new challenges when treated together. The energy "uncertainty" introduced in quantum theory combines with the mass-energy equivalence of special relativity to allow the creation of particle/anti-particle pairs by quantum fluctuations when the theories are merged. As a result there is no self-consistent theory which generalizes the simple, one-particle Schrödinger equation into a relativistic quantum wave equation. The most successful approach to this problem, developed in the early 30's, begins not with a single relativistic particle, but with a relativistic classical field theory, such as Maxwell's theory of electromagnetism. This classical field theory is then "quantized" in the usual way and the resulting quantum field theory realizes a consistent combination of quantum mechanics and relativity. However, this theory is inherently a many-body theory with the quanta of the normal modes of the classical field having all the properties of physical particles. The resulting many-particle theory can be relatively easily handled if the particles are heavy on the energy scale of interest or if the underlying field theory is essentially linear. Such is the case for atomic physics where the electron-volt energy scale for atomic binding is about a million times smaller than the energy required to create an electron positron pair and where the Maxwell theory of the photon field is essentially linear.

32. Quantum Theory quantum theory. Why do we need quantum theory? Classical (Newtonian) mechanics instruments.Evidence for quantum theory. Classical mechanics http://www.srikant.org/core/node12.html

Next: Atoms and the Periodic Up: Laws of Physics : Previous: *Statistical Mechanics Contents Subsections Why do we need Quantum Theory? Evidence for Quantum Theory Planck's Quantum Hypothesis Bohr atom;Electron Wave ... *Quantum Theory and Philosophy Quantum Theory Why do we need Quantum Theory? Classical (Newtonian) mechanics works perfectly in explaining the world around us, and is accurate enough for even charting the trajectory of probes sent to Jupiter and beyond. So why are we not content with classical physics? Where does the need for quantum theory arise? Quantum theory unveils a new level of reality, the world of intrinsic uncertainty, a world of possibilities, which is totally absent in classical physics. And this bizarre world of quantum physics not only offers us the most compelling explanation of physical phenomena presently known, but is also one of the most prolific source of modern technologies, providing society with a cornucopia of devices and instruments. Evidence for Quantum Theory Planck's Quantum Hypothesis A black body which is maintained at a constant temperature T steadily loses energy from its surface in the form of electromagnetic radiation. Since the atoms composing the black body are in contact with a heat bath at temperature

33. The Theory Of Distance-time Defining space and time in the literal way we experience it via particles-I create a quantum theory of space and time. http://www.comcity.com/distance-time

34. Pictures Of Physicists - Pioneers Of Quantum Theory A Picture Gallery of Famous Physicists. Pioneersof quantum theory. (Click for larger pictures). http://www.th.physik.uni-frankfurt.de/~jr/physpicquant.html

A Picture Gallery of Famous Physicists Pioneers of Quantum Theory (Click for larger pictures) P.A.M. Dirac A. Einstein W. Heisenberg M. Planck W. Pauli N. Bohr M. Born L. deBroglie A. Sommerfeld P. Ehrenfest P. Debye E.P. Wigner G. Gamow S.A. Goudsmit D. Bohm R. Peierls S.N. Bose H.J. Bhabha J.S. Bell Back to the picture gallery of physicists Last modified: Sept. 9, 1999 Joachim Reinhardt

35. Physics Department, Trinity College Dublin - Quantum Theory Physics Department, Trinity College Dublin. WHAT IS quantum theory ABOUT? QuantumTheory. tells us about the nature of the microscopic http://www.tcd.ie/Physics/Schools/what/atoms/quantum/intro.html

Physics Department, Trinity College Dublin. WHAT IS QUANTUM THEORY ABOUT? Energy Quantisation The Uncertainty Principle Particle-Wave Duality Indeterminacy Quantum Theory tells us about the nature of the microscopic constituents of matter, from atoms and molecules to atomic nuclei and quarks. These tiny particles behave in a totally different way from objects in our ordinary everyday experience. What we have learnt about matter on atomic and subatomic scales has produced new ideas about how the universe evolved and led to technological advances in nuclear physics and materials science which have changed the way we live. On the other hand Quantum Theory has shown that light is not just an electromagnetic wave behaves in some ways like a particle - the photon. This insight has produced the field of Quantum Optics, which has spawned the laser and optoelectronics. Applications to cryptography and computing are still in an experimental stage. Planck's great idea was the quantisation of energy .....

36. Physics Department, Trinity College Dublin - Quantum Theory Physics Department, Trinity College Dublin. WHAT IS quantum theory ABOUT? http://www.tcd.ie/Physics/Schools/what/atoms/quantum/duality.html

Physics Department, Trinity College Dublin. WHAT IS QUANTUM THEORY ABOUT? Introduction Energy Quantisation The Uncertainty Principle Indeterminacy Particle-Wave Duality In 1900 Planck had suggested that atoms and molecules could only change their energy in discrete units. In 1905 Einstein went further and suggested that light itself could behave like little particles or quanta, with energy proportional to the frequency (the colour) of the light. These particles of light are what we now call photons. Einstein's suggestion went straight to the heart of Quantum Theory, and began to expose the fundamental conceptual difficulties associated with it. Indeed it was for this work that he was awarded the Nobel prize in 1921. During the 19th century experimental and theoretical work on light had demonstrated - apparently conclusively - that light was a wave. The key experimental evidence for this is the observation of interference. If you drop a pebble into a still pond, you see circular wavelets spreading out. Drop another pebble in nearbye, and the two sets of waves will interfere where they overlap. Where the crest of one and the trough of another coincide, they cancel to leave the water undisturbed. At neighbouring places the cancellation is less perfect, and elsewhere the peaks or troughs of the two waves coincide and reinforce each other. Exactly this type of interference pattern can be observed with light, and it can only be explained by a wave theory. If light behaves like little particles there is a difficulty in accounting for interference phenomena. But even worse, from the point of view of classical physics, streams of electrons, neutrons, and even atoms produce similar interference patterns. So particles show wave-like behaviour, and light, according to Einstein, shows particle-like behaviour. This is the famous problem of particle-wave duality.

37. Atomic Theories From Aristotle Thru Quantum Theory A site for students with chemists and their atomic theories throughout history. Includes Aristotle, Democritus, Dalton, Bohr, Thomson, Rutherford and the modern quantum theory. http://www.angelfire.com/sc2/atomtheory

38. Home quantum theory and consciousness; the metaphysics of nonduality; the end of suffering and the discovery of our true nature - an on-line or downloadable book by Stanley Sobottka, professor of Physics at the University of Virginia. http://faculty.virginia.edu/consciousness/

A Course in Consciousness Part 1: Quantum theory and consciousness Part 2: The metaphysics of nonduality Part 3: The end of suffering and the discovery of our true nature Stanley Sobottka Emeritus Professor of Physics University of Virginia Charlottesville, VA Comments? Questions? Send them to me at ses2r@virginia.edu If you are viewing this page your browser doesn't support frames, but you can still view the whole book! Just click on Table of Contents . Then when you open a chapter, it will appear in a separate window. Put the two windows side-by-side, and it is the same as using frames!

39. Jadczyk Consulting, Inc. Piecewisedeterministic evolution punctuated by random events. The site has papers on physics and Category Society Philosophy Seeds and Escapes...... Events ; HTML online version of Time of Events ; Postscript versionof Time of Arrival in Event Enhanced quantum theory ; Gzipped http://www.cassiopaea.org/quantum_future/

Arkadiusz Jadczyk's Webspace Data Page Publication List Jadczyk's Homepage Quantum Future (QF) Page ... Quantum Jumps, EEQT and the Five Platonic Fractals (in German Principia Physica or Caveat Emptor? Transdimensional Transfer Techniques Jacques Vallee Bioelektronika w oczach fizyka teoretyka (in Polish Œwiat na krawêdzi katastrofy? Drogi przeobra¿en cywilizacji. Pytania od Janusza Zagórskiego (in Polish Quantum Fractals Critical notes on Hoagland and Bearden Critical notes on Val Valerian's "Matrix III" Data for page on "Heretical Verities" by T. Phipps ... QF History and Credits QF Metaphysics QF Physics QF Extracts Physics of the Mysterious ... Powodz 1997 Last modified on: December 12, 2001. Cassiopaean Home QF Home Laura's Home Search Cassiopaea ... Mailing List Site maintained by ark@cassiopaea.org 2771 since November 7, 2002.

40. [quant-ph/9611048] The Quantum Theory Of Ur-Objects As A Theory Of Information Here the quantum theory of urobjects proposed by CF von Weizsaecker is reviewed, and the philosophica Category Science Math Applications Information Theory Papers...... http://xxx.lanl.gov/abs/quant-ph/9611048

Quantum Physics, abstract quant-ph/9611048 The Quantum Theory of Ur-Objects as a Theory of Information Authors: Holger Lyre Comments: 11 pages Journal-ref: Int.J.Theor.Phys. 34 (1995) 1541 The quantum theory of ur-objects proposed by C. F. von Weizsaecker has to be interpreted as a quantum theory of information. Ur-objects, or urs, are thought to be the simplest objects in quantum theory. Thus an ur is represented by a two-dimensional Hilbert space with the universal symmetry group SU(2), and can only be characterized as ''one bit of potential information''. In this sense it is not a spatial but an ''information atom''. The physical structure of the ur theory is reviewed, and the philosophical consequences of its interpretation as an information theory are demonstrated by means of some important concepts of physics such as time, space, entropy, energy, and matter, which in ur theory appear to be directly connected with information as ''the'' fundamental substance. This hopefully will help to provide a new understanding of the concept of information. Full-text: PostScript PDF , or Other formats References and citations for this submission: SLAC-SPIRES HEP (refers to , cited

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