Geometry.Net - Science: Quantum Mechanics


Home - Science - Quantum Mechanics

e99.com Bookstore

Images

Newsgroups

121-140 of 180 Back | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Next 20

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Quantum Mechanics: more books (100)

Angular Momentum in Quantum Mechanics (Investigations in Physics) by A. R. Edmonds, 1996-01-08
Path Integral Approach to Quantum Physics: An Introduction (Theoretical and Mathematical Physics) by Gert Roepstorff, 1996-06-20
More Than One Mystery: Explorations in Quantum Interference by Mark P. Silverman, 1994-12-19
Quantum Mechanics. Symmetries by Walter Greiner, Berndt Müller, 2008-06-20
Schaum's Outline of Quantum Mechanics (Schaum's) by Elyahu Zaarur, Phinik Reuven, 1998-04-30
Quantum Field Theory Demystified by David McMahon, 2008-02-29
The Principles of Quantum Mechanics Fourth Edition [ 4th Edition ] by Paul Adrien Maurice Dirac, 1958
Quantum Physics: Illusion or Reality? (Canto) by Alastair I. M. Rae, 2004-10-25
Lectures on Quantum Mechanics for Mathematics Students (Student Mathematical Library) by L. D. Faddeev and O. A. Yakubovskii, 2009-03-09
Quantum Mechanics, Fifth Edition by Alastair I. M. Rae, 2007-09-19
Quantum Mechanics by Leonard I. Schiff, 1968-08
The Theory Of Groups And Quantum Mechanics by Hermann Weyl, 2008-06-13
The Black Hole War: My Battle with Stephen Hawking to Make the World Safe for Quantum Mechanics by Leonard Susskind, 2009-07-22
The Picture Book of Quantum Mechanics by S. Brandt, Hans D. Dahmen, 2000-12-21

lists with details

Molecular Quantum Mechanics - Conference In Honor Of Nicholas Handy
http://www.ccc.uga.edu/Handy/
Quantum Logic And Probability Theory
How quantum mechanics can be regarded as a nonclassical probabilistic calculus; by Alexander Wilce.
http://plato.stanford.edu/entries/qt-quantlog/

Extractions: FEB At its core, quantum mechanics can be regarded as a non-classical probability calculus resting upon a non-classical propositional logic. More specifically, in quantum mechanics each probability-bearing proposition of the form "the value of physical quantity A lies in the range B " is represented by a projection operator on a Hilbert space H . These form a non-Boolean in particular, non-distributive orthocomplemented lattice. Quantum-mechanical states correspond exactly to probability measures (suitably defined) on this lattice. What are we to make of this? Some have argued that the empirical success of quantum mechanics calls for a revolution in logic itself. This view is associated with the demand for a realistic interpretation of quantum mechanics, i.e., one not grounded in any primitive notion of measurement. Against this, there is a long tradition of interpreting quantum mechanics operationally, that is, as being precisely a theory of measurement. On this latter view, it is not surprising that a "logic" of measurement-outcomes, in a setting where not all measurements are compatible, should prove not to be Boolean. Rather, the mystery is why it should have the particular non-Boolean structure that it does in quantum mechanics. A substantial literature has grown up around the programme of giving some independent motivation for this structure ideally, by deriving it from more primitive and plausible axioms governing a generalized probability theory.
Schroedinger's Cat
The Present Situation In quantum mechanics. Erwin Schroedinger. A translation 2. Statistics of Model Variables in quantum mechanics. At the
http://www.emr.hibu.no/lars/eng/cat/Default.htm

Extractions: The Present Situation In Quantum Mechanics Erwin Schroedinger A translation of Schroedingers "cat paradox" paper" Translator: John D. Trimmer This translation was originally published in Proceedings of the American Philosophical Society , 124, 323-38. [And then appeared as Section I.11 of Part I of Quantum Theory and Measurement (J.A. Wheeler and W.H. Zurek, eds., Princeton university Press, New Jersey 1983).] This is a translation of Schro:dinger's three-part 1935 paper in Die Naturwissenschaften . Earlier that same year there had appeared the Einstein, Podolsky, Rosen paper (also famous in "paradoxology") which, Schro:dinger says, in a footnote, motivated his offering. Along with this article in German, Schro:dinger had two closely-related English-language publications. But the German, aside from its one-paragraph presentation of the famous cat, covers additional territory and gives many fascinating insights into Schro:dinger's thought. The translator's goal has been to adhere to the logical and physical content of the original, while at the same time trying to convey something of its semi-conversational, at times slightly sardonic flavor. TRANSLATION In the second half of the previous century there arose, from the great progress in kinetic theory of gases and in the mechanical theory of heat, an ideal of the exact description of nature that stands out as the reward of centuries-long search and the fulfillment of millennia-long hope, and that is called classical. These are its features.
Exotic Probability Theories And Quantum Mechanics References
Complex and negative probabilities and their relation to quantum mechanics
http://physics.bu.edu/~youssef/quantum/quantum_refs.html

Extractions: Dear Friends, I thought that it might be useful to collect references relevant to exotic probability theories and their relation to quantum mechanics. If you see something missing, please let me know. If you are new to this subject, there is no comprehensive review or introduction, but you might want to look at my talk from the 1995 Bayesian conference to get an idea of what this is all about. Regards, Saul Youssef A.V. Belinskii, How could you measure a negative probability? , JETP letters, 59, 301 (1994). D.J.Miller, Realism and Time Symmetry in Quantum Mechanics , Phys. Lett. A 1996. Ariel Caticha, Consistency and Linearity in Quantum Theory , Phys.Rev. A57, 1572 (1998). Ariel Caticha, Consistency, Amplitudes and Probabilities in Quantum Theory , preprint, 1998. Richard Feynman, Negative Probabilities , in Quantum Implications , eds B.J. Hiley and F.David Peat (Routledge and Kegan Paul, 1987). F.H.Frohner, The Riesz-Fejer Theorem: Missing Link between Probability Theory and Quantum Mechanics , Forschungszentrum Karlsruhe, FZKA 5888, May, 1997.
Schroedinger: "The Present Situation In Quantum Mechanics"
THE PRESENT SITUATION IN quantum mechanics A TRANSLATION OF SCHRÖDINGER S CAT PARADOX PAPER . 2. Statistics of Model Variables in quantum mechanics.
http://www.tu-harburg.de/rzt/rzt/it/QM/cat.html

Extractions: Translator: John D. Trimmer This translation was originally published in Proceedings of the American Philosophical Society , 124, 323-38. [And then appeared as Section I.11 of Part I of Quantum Theory and Measurement (J.A. Wheeler and W.H. Zurek, eds., Princeton university Press, New Jersey 1983).] in Die Naturwissenschaften . Earlier that same year there had appeared the Einstein, Podolsky, Rosen paper TRANSLATION In the second half of the previous century there arose, from the great progress in kinetic theory of gases and in the mechanical theory of heat, an ideal of the exact description of nature that stands out as the reward of centuries-long search and the fulfillment of millennia-long hope, and that is called classical. These are its features. Of natural objects, whose observed behavior one might treat, one set sup a representation - based on the experimental data in one's possession but without handcuffing the intuitive imagination - that is worked out in all details exactly
Volodymyr Krasnoholovets's Home Page
Professor at the National Academy of Science, Kyiv. Contains description research in conventional, applied and fundamental physics. Also deals with the submicroscopic construction of nature, quantum mechanics is combined with gravity.
http://www.inerton.kiev.ua/
Origins Of Quantum Mechanics
This assumption was one of the postulates with which Bohr set up his atomic model which was later superceded by the true quantum mechanical model.
http://itl.chem.ufl.edu/4412_aa/origins.html

Extractions: The hollow chamber is a good approximation of a black body. It has a tiny aperture through which radiation is emitted, and is immersed in a heat bath to keep it at constant temperature. The radiation emitted can be detected and analyzed with a spectrometer in order to obtain the spectral distribution of the emitted radiation energy. Spectral Distribution of the black body: The spectrum of the black body radiation is plotted for three different temperatures, 2000 K, 1750 K, and 1250 K. They appear as differently coloured solid curves with the radiation energy plotted as energy density per wavelength unit over wavelength (measured in nm). The total emitted radiation energy of the black body at a given temperature, i.e. the integral, M, over the spectral distribution at each individual temperature setting, is proportional to the 4th power of T: with the constant If the wavelength of maximum emission of the spectral distribution of the black body is plotted over 1/T, one obtains a straight line.
Codes For PHYCS 498A
Codes for course by Richard M. Martin.
http://www.physics.uiuc.edu/research/ElectronicStructure/498-s97/codes/code.html

Extractions: - Main program and other code. simpe.f - Simpson's rule integration, refines grid until desired accuracy is obtained. hybrid.f - Hybrid bisection/secant root finder. sample input file sample output file All above codes in a tar-file: codes.tar Poison Equation solution by Green's function method Solution of 1d Schrodinger equation by shooting method Source code: eigen_mod.f
Mysteries, Puzzles And Paradoxes In Quantum Mechanics - Garda 2003
Translate this page
http://pandora.fisica.unimi.it/~garda2003/
Theory: 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

Extractions: Parity Many physics processes have a property known as parity invariance This means that the probability of a particle process occurring is exactly the same as the probability of the same process occurring with the position vectors and directions of travel of all particles reversed. What does it mean to reverse a position vector? Choose any point as your position vector origin and draw a line from the origin to the position of an object. That is the position vector of the object. A parity transformation about that origin would relocate the object at a point found by flipping that position vector so it goes the same distance from the origin but in exactly the opposite direction. It turns up to down, left to right, and front to back! This seems odd because we are used to thinking of up as physically very different from down, but if we reverse everything then the position of the earth changes, too. Consider, for example, a collision of two spheres in space. There would be no way you could tell by looking at a movie whether you were watching an actual collision or a parity reversed simulation of the collision, each would look equally plausible. Parity invariance is true for strong and electromagnetic interactions . This has many consequences for the possible outcomes in decays and scattering events One of the big surprises of the 1950s was the recognition that parity invariance is not true for weak interactions Right- and Left-Handed Particles
Basics Of Quantum Mechanics
Basics of quantum mechanics. quantum mechanics is the Foundation of Chemistry quantum mechanics Explains the Structure of Atoms and Molecules.
http://bouman.chem.georgetown.edu/atomorbs/qmbasics.html

Extractions: HTTP 200 Document follows Date: Thu, 27 May 2004 04:22:31 GMT Server: NCSA/1.5.1 Content-type: text/html Quantum Mechanics is the Foundation of Chemistry Quantum Mechanics Explains the Structure of Atoms and Molecules Quantum Mechanics Explains How Molecules React Quantum Mechanical Basis of Atomic Structure Go back to General Chemistry page Go back to de Dios' home page
Physics 232 Lecture Notes
A set of online course notes for introductory physics. Includes electromagnetic fields, relativity, and quantum mechanics.
http://www.pa.msu.edu/courses/1997spring/PHY232/lectures/

Extractions: Lecture Notes by Topic Course information Coulomb's law Electric fields and electric potentials Gauss' law and conductors ... Cosmology and astrophysics These files are prepared not as a substitute for the text book, but instead as a substitute for lecture notes. Hopefully, one can then attend lecture and concentrate on the material rather than writing notes.
Quantum Mechanics Of Gaia Brain
Gaia Brain is the biological model for politics and economics. We could build a better society if we each (or most of us, or a
http://user.intersatx.net/jc/quantum.html

Extractions: Gaia Brain ' is the biological model for politics and economics. We could build a better society if we each (or most of us, or a representative sample) express our feeling, our opinion about what limits we ought to place on human impacts on earth, (pollution, taking of resources, paving, etc.), and see to it that our democratic society produces a reality that respects the limits that the people define. If the average of all expressed opinions were taken as an overall limit of acceptable human impacts, then sale of permits to take resources or degrade natural resources, up to that limit, would put economic costs onto industries in proportion to how much natural resources they use. Industries would feel the ecological harm they do in their bottom line. They would have incentive to change their processes to reduce pollution and demands on resources. We would all have incentive to change our habits. As those things that are of marginal value to us but that have high ecological costs associated with their production increase in price, many of us will decide that they are not worth the higher price. We will stop buying those things. Injury to the earth, to the environment would be reduced. When our actions harm ecosystems or degrade environmental quality, we will get a signal, an economic price to pay, that deters us from performing those harmful actions to excess. This system of negative feedback would act as a sensory nervous system for earth, causing a reduction of injury or 'harm' to earth. Through the use of fees on the taking of resources and putting of pollution, we can bring actual impacts of human economic activity into accord with the expressed will of the people. This 'sensory nervous system for earth' emerges from nothing more nor less than direct
Mangled Worlds Quantum Mechanics
When Worlds Collide Mangled Worlds quantum mechanics. by Robin Hanson, March 21, 2003. Robin Hanson, DriftDiffusion in Mangled Worlds quantum mechanics.
http://hanson.gmu.edu/mangledworlds.html

Extractions: by Robin Hanson , March 21, 2003. This variation on the many worlds interpretation of quantum mechanics allows us to derive the Born probability rule via finite world counting and no new physics. One of the deepest questions in physics is this: what exactly happens during a quantum measurement? Under the traditional (or "Copenhagen") view, quantum mechanics tells you how to calculate the probabilities of different measurement outcomes. You are to create a wave that describes your initial situation, and then have your wave evolve in time according to a certain linear deterministic rule until the time of a measurement. The equation that describes this rule is very much like the equations that govern the spread of waves over water, or of sound waves in the air. At the time of a measuremment you are to use the "Born rule" to convert your wave into probabilities of seeing different outcomes. This rule says to break your wave into compoments corresponding to each measurement outcome, and that the probability of each outcome is the measure (or size) of the corresponding component. After a measurement, you can again continue to evolve your wave via the linear deterministic rule, starting with the wave component corresponding to the outcome that was seen. The problem is, this procedure seems to say that during quantum measurements physical systems evolve according to a fundamentally different process. If, during a quantum measurement, you applied the usual wave propogation rule, instead of the Born probability rule, you would get a different answer. Now for generations students have been told not to worry about this, that the quantum wave doesn't describe what is really out there, but only what we know about what is out there. But when students ask what is really out there, they are told either that is one of the great mysteries of physics, or that such questions just do not make sense.
What Is Quantum Physics?
History and explanation of quantum physics / quantum mechanics.
http://www.jracademy.com/~jtucek/science/what.html

Extractions: What is Quantum Physics? Does the thought of quantum physics send a chill down your spine, just like the words calculus, differential equations, and -gasp- organic chemistry? You may not even think that quantum physics is a serious science, like the more familiar Newtonian physics. Just relax! I'm sure you're comfortable with regular physics, which describes the way that matter interacts with other matter, i.e. gravity, velocity, etc. If not, maybe you should check out my regular Interactive Physics site. Anyway, quantum physics is just the physics of the incredibly small. While Newtonian physics can suitably describe the orbit of the planets or the energy transformations during a game of pool, quantum physics describes how electrons surround the nucleus of the atom and other subatomic actions. At this point, you may be thinking that there's not that big of a difference between these two sciences. Hey, both explain how matter interacts with other matter, so what's the big deal? The difference is that the common laws of physics begin to deteriorate on small scales. For example, Nippendenso (Japan Electric) built a car that's only half a millimeters long. One could easily mistake it for a grain of rice if not for its gold color. At the scale of 1 to 1000, physics is already changing. Oil would now gum up the engine, and the tires wouldn't have enough traction to move the car.
Physics Encyclopedia: Quantum Mechanics
Nonrelativistic quantum mechanics. Physics Main Other Quantum Pages Help Suggest a Site Intro into quantum mechanics - an explanation by Todd.
http://members.tripod.com/~IgorIvanov/physics/qm.html
Welcome To PhyCon
Explains astrophysical concepts such as relativity, quantum mechanics, gravity, black holes, dark matter, quasars, macrocosmos and microcosmos.
http://www.solnabrass.com/phycon/
Quantum Mysteries
If you understood this, you would understand quantum physics but as Feynman also said, nobody understands quantum mechanics (The Character of Physical Law
http://www.biols.susx.ac.uk/home/John_Gribbin/quantum.htm

Extractions: Back to John Gribbin's Home Page Deepening the quantum mysterie s The "central mystery" of quantum physics just got more mysterious. Experimenters from the United States and Austria have got together to provide a new demonstration of how light going through a "double slit" experiment seems to know before it sets out in its journey exactly what kind of traps have been set for it along the way. This is a variation on the Young's slit experiment, familiar from school laboratory demonstrations of the wave nature of light. When a beam of monochromatic light is shone through two narrow holes in a screen, the light spreading out from the two holes interferes, just like ripples interfering on the surface of a pond, to produce a characteristic pattern on a second screen. The mystery is that light can also be described as a stream of particles, called photons. The light source in a Young's slit experiment can be turned down to the point where it consists of individual photons going through the experiment, one after the other. If the spots of light made by individual photons arriving at the second screen (actually a photoelectric detector) are added together, they still form an interference pattern, as if each photon goes through both holes and interferes with itself on the way through the experiment. It was Richard Feynman who described this as "the central mystery" of quantum theory, and then corrected himself, saying that in fact it is "the only mystery". If you understood this, you would understand quantum physics but as Feynman also said, "nobody understands quantum mechanics" (The Character of Physical Law, BBC Publications, 1965).
A Comp.ai.philosophy FAQ
Overview and FAQ of web resources on Quantum Computing, Artificial Intelligence and Consciousness.
http://www.dontveter.com/caipfaq/systems.html

Extractions: http://www.dontveter.com , commercial use is prohibited. This material cannot be quoted at length or posted elsewhere on the net or included in CD ROM collections. Short quotations are permitted provided proper attribution is given. Algorithms and Hardware Most people interested in AI BELIEVE that a digital computer can do all that people can do if it is programmed correctly. Meaning that there are plenty of arguments over what the correct method of programming will turn out to be. Also meaning that some people doubt digital computers can do the job. Symbol Processing Symbol processing is the original dominant BELIEF of the AI community. Symbol processing requires the use of symbols, structures of symbols and rules. Symbols are defined as unique marks as on a piece of paper. Symbols can be equal or not equal but there are no other relations defined between them. Strictly speaking then, numbers are not allowed because numbers have an ordering to them, one unique number will be greater than or less than some other number. In practice symbol processing programs often incorporate the use of numbers so most "symbol processing" systems go beyond the processing of symbols. Implicitly they are saying that the statement, "symbol processing is necessary and sufficient for general intelligent action" is clearly false. They should go around saying that "symbol processing and numerical computing are necessary and sufficient for general intelligent action". But symbol processing believers go around saying "symbol processing is necessary and sufficient for general intelligent action" anyway.
Brief Review Of Quantum Chemistry
Last Revised on 7 August 1997. Contents; The Motivation for quantum mechanics The Ultraviolet Catastrophe; The Photoelectric Effect;
http://vergil.chemistry.gatech.edu/notes/quantrev/quantrev.html

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

121-140 of 180 Back | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Next 20