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e155120b1b315ca3 | The Full Wiki
Quantum: Quiz
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Question 1: An example of an entity that is quantized is the energy transfer of ________ of matter (called fermions) and of photons and other bosons.
Elementary particleStandard ModelParticle physicsQuark... |
497e4d6a6628b6ad | The minimal realist interpretation
of quantum theory
Minimizing quantum strangeness
Do we really have to give up most of our common sense ideas about how the universe works because of quantum theory? The minimal realist interpretation aims to answer this question by trying to preserve as much of common sense as possi... |
7f8b1a521630fce8 | Seeing Past Darwin V: Life and Emergence
great spot of jupiterNatural genetic engineering genetic engineering in bacteria.
Bipedal goats and dogs.
Maze-solving slime mold, ferrets that see with their auditory cortex, fruit flies with inverted visual fields, and humans who "see" with their tongues.
These are some of... |
369aa9286cc4622d |
Etymology and discovery
The word quantum comes from the Latin quantus, meaning "how great". "Quanta", short for "quanta of electricity" (electrons), was used in a 1902 article on the photoelectric effect by Philipp Lenard, who credited Hermann von Helmholtz for using the word in the area of electricity. However, th... |
8086f226bb11c208 | College Math Teaching
August 2, 2012
MAA Mathfest Madison Day 1, 2 August 2012
I am sitting in the main ballroom waiting for the large public talks to start. I should be busy most of the day; it looks as if there will be some interesting all day long.
I like this conference not only for the variety but also for the... |
3267429ffffeee03 | Borel functional calculus
In functional analysis, a branch of mathematics, the Borel functional calculus is a functional calculus (that is, an assignment of operators from commutative algebras to functions defined on their spectra), which has particularly broad scope.[1][2] Thus for instance if T is an operator, apply... |
a8d83c41cd011621 | Solving the Measurement Problem and then Steppin’ Out over the Line Riding the Rarest Italian: Crossing the Streams to Retrieve Stable Bioactivity in Majorana Bound States of Dialy zed Human Platelet Lysates
Mark Roedersheimer*
Research, GITE/Burn Surgery, UC Denver, USA
© Mark Roedersheimer; Licensee Bentham Open.
... |
568c4ce430d43766 | By the mouth of two witnesses, or three witnesses, shall the one liable to death be put to death; he shall not be put to death by the mouth of one witness. (Devarim-Deuteronomy 17:6)
I wrote about witnesses in my earlier post imaginatively called Witnesses. As Deuteronomy, restates many mitzvoth (commandments) introdu... |
192016297c2d79ca | Theoretical estimates of the electron density for the first few hydrogen atom electron orbitals shown as cross-sections with color-coded probability density
An atom is a physical system which includes positive and negatively charged particles. Classical electrostatics can help understanding, but always bear in mind th... |
2bc585e1e1de478f | guest post by Prof Sir John Meurig Thomas (Materials Science, Cambridge)
CDBU welcomes a diversity of views. Please contact us if you would like to be part of the conversation.
This article is a slightly modified form of one that appears in Angewandt Chemie 2013 the original version of which can be downloaded here.
... |
de7ba7cb05b12f98 | paul le
Sequences and Series in Physics
One thing I wish my mathematics professors emphasized more (or at least mentioned in passing) was how useful sequences and series are in physics, especially Taylor Series.
The main idea with Taylor Series is that you can represent any analytic function as an infinite sum of te... |
ced4374f3f83a959 | Download المحاضرة الثانية اساسيات الكم
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262698400068dc14 | Uncertainty equation
How do you calculate uncertainty?
Standard measurement uncertainty (SD) divided by the absolute value of the measured quantity value. CV = SD/x or SD/mean value. Standard measurement uncertainty that is obtained using the individual standard measurement uncertainties associated with the input qua... |
373698e425c769d9 | Young Researchers Colloquium
Jacek Krajczok, Filip Rupniewski, Jacopo Schino
Fridays 15:00 - 16:00, room 403/Zoom.
Next talk:
23.04.2021 Speaker: Sandra Lucente (University of Bari, Department of Physics)
Title: Making space for spaces
Abstract: In this talk, we summarize the various definitions of dimension. Our... |
5c591318ea1557ea | Edition: U.S. / Global
Published: March 18, 2004
Sir John A. Pople, a mathematician who became a chemist and won a Nobel Prize in 1998 for a computer tool that describes the dance of molecules in chemical reactions, died Monday at his daughter's home in Chicago. He was 78.
The cause of death was liver cancer, his f... |
c1c9449e13c95d03 | Take the 2-minute tour ×
In many areas of mathematics (PDE, Algebra, combinatorics, geometry) when we have difficulty in coming with a solution to a problem we consider various notions of "generalized solutions". (There are also other reasons to generalize the notion of a solution in various contexts.)
I would like t... |
89d55740763ec8af | Molecular orbital theory : definition of Molecular orbital theory and synonyms of Molecular orbital theory (English)
definition - Molecular orbital theory
definition of Wikipedia
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Molecular orbital theory
In chemistry, molecular orbital (MO) theory is a method for determining molecular structu... |
4a2f960bc9d786b9 | Thursday, May 3, 2012
Density Matrices and Density Operators
John von Neumann at Los Alamos in the 1940's
In Phyisics graduate school, 1st year 2nd semester, when they students take Quantum Mechanics, they are taught the important subject of Density Operators and Matrices. This may be over the head of most of you my... |
3c883aa235e06d8e |
February 28, 2006 by James N. Gardner
Originally published in the International Journal of Astrobiology May 2005. Reprinted on February 28, 2006.
Goal 7 of the NASA Astrobiology Roadmap states: “Determine how to recognize signatures of life on other worlds and on early Earth. Identify biosignatures that can revea... |
49132e39938b228d | Theoretical chemistry
From Wikipedia, the free encyclopedia
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Theoretical chemistry seeks to provide explanations to chemical and physical observations. Should the properties derived from the quantum theory give a good account of the above mentioned phenomena, we derive consequences using th... |
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Wheeler's delayed choice experiment is a variant of the classic double slit experiment for photons in which the detecting screen may or may not be removed after the photons had passed through the slits. If removed, there are lenses ... |
b78731d1f1640e06 | Binding Energy
1. The graph of potential energy of two nucleons shows a minima at 100 MeV,but the binding energy of a deuterium nucleus is close to just 1 MeV.
Since binding energy is the energy required to rip apart the nucleus ,hypothetically,should the two values not be same?
2. jcsd
3. ChrisVer
Chr... |
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Given a delta function $\alpha\delta(x+a)$ and an infinite energy potential barrier at $[0,\infty)$, calculate the scattered state, calculate the probability of reflection as a function of $\alpha$, momentum of the packet and energy. Also calculate the probability of finding the particle between the two barr... |
b0d0a0bc94951709 | The Physics Behind Schrödinger's Cat Paradox
Google honors the physicist today with a Doodle. We explain the science behind his famous paradox.
Erwin Schrödinger, one of the fathers of quantum mechanics, is famed for a number of important contributions to physics, especially the Schrödinger equation, for which he rec... |
ec828588c561357a | The Astounding Link Between the P≠NP Problem and the Quantum Nature of Universe
With some straightforward logic, one theorist has shown that macroscopic quantum objects cannot exist if P≠NP, which suddenly explains one of the greatest mysteries in physics
The paradox of Schrodinger’s cat is a thought experiment dream... |
486be6cd99690a6e | [shroh-ding-er, shrey-; Ger. shrœ-ding-uhr]
Schrödinger, Erwin, 1887-1961, Austrian theoretical physicist. He was educated at Vienna, taught at Breslau and Zürich, and was professor at the Univ. of Berlin (1927-33), fellow of Magdalen College, Oxford (1933-36), and professor at the Univ. of Graz (1936-38), the Dublin I... |
ef64924c34b2fde6 | Frank Znidarsic 2
##Znidarsic, Franck P.E, PART 2:
# Online preview of historic of “Zero Point Technologies” : (Open the original pages links to see the numerous pictures and videos)
(see picture on original webpage) This author conducts a cryogenic zero point energy experiment. The results were published by Hal Fo... |
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Quantum mechanics of a particle
1. Mar 4, 2005 #1
I have a couple things I don't understand:
1. Why is it that the more you conifne a particle, the higher its energy is?
2. Why is it that the more nodes there are in the wavefunction the higher the energy is?
... |
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Hyperspherical Approach to Quantal Three-body Theory
TitleHyperspherical Approach to Quantal Three-body Theory
Publication TypeThesis
Year of Publication2012
AuthorsWang, J
Hyperspherical coordinates provide a systematic way of describing three-body systems. Solving three-bod... |
90ef229b82a9d274 | NSF and Stony Brook University: New Nanotechnology to produce sustainable, clean water for developing nations: Video
This technology would enable communities to produce their own water filters using biomass nanofibers, making clean water more accessible and affordable.
The research in this episode was supported by... |
bbcb11781f29ec17 | The Book of Universes by John D. Barrow (2011)
This book is twice as long and half as good as Barrow’s earlier primer, The Origin of the Universe.
In that short book Barrow focused on the key ideas of modern cosmology – introducing them to us in ascending order of complexity, and as simply as possible. He managed to ... |
0b997c3dcf4ef852 | Download The Symplectization of Science - Pacific Institute for the
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26ec28e5df8924d3 | David Albert
A Quantum Threat to Special Relativity
By David Z. Albert and Rivka Galchen
Scientific American, March 2009
Edited by Andy Ross
Our intuition is that things can only directly affect other things that are right next to them. We term this intuition locality.
Before quantum mechanics, we believed that ... |
f5ed4c03fccfd89d | lördag 31 december 2011
Quantum.informational medicine from Belgrade.
I got a letter from Rakovic' with greetings for the New Year. It contained an interesting link. Abstracts in english.
Belgrade, 23-25 September 2011
EDITORS NOTE p.12-14, D. Raković, M. Mićović, S. Arandjelović
Contemporary medicine has put its... |
eae6bf98e8054ccf | Electron configuration
From Wikipedia, the free encyclopedia
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In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.[1] For example, the electron configu... |
3cbf954d1c359026 | COSMOLOGICAL CONS(tant → erved charge)
The road to black hole thermodynamics with Λ
by Dmitry Chernyavsky and Kamal Hajian
What are volume and pressure in black hole thermodynamics? That is the question!
Chernyavsky Balloon
What do the gas in a balloon and a black hole have in common? For a regular CQG reader the... |
58c69457385d994a | Monday, July 07, 2014
Droplets and pilot waves vs quantum mechanics
All of Nature is governed by mathematics. So we encounter mathematical objects and equations everywhere. Even some types of ordinary or partial differential equations are recycled hundreds of times, in very diverse situations.
A person who hasn... |
22d67a0c6d41613a | This includes the kinetic energy of the nucleus in the problem, because the total (electron plus nuclear) kinetic energy is equivalent to the kinetic energy of the reduced mass moving with a velocity equal to the electron velocity relative to the nucleus. . z n and takes the form. , 1 {\displaystyle z'} {\displaystyle ... |
9a058de0e2d2259c | Skip to main content
Physics LibreTexts
14.4: The Atom
• Page ID
• You can learn a lot by taking a car engine apart, but you will have learned a lot more if you can put it all back together again and make it run. Half the job of reductionism is to break nature down into its smallest parts and understand the rules... |
217dfbeb177ea774 | Effective photon-photon interaction in a
two-dimensional “photon fluid”
R.Y. Chiao, T.H. Hansson, J.M. Leinaas and S. Viefers Department of Physics,University of California at Berkeley, Berkeley, CA 94720-7300, USA Stockholms universitet, AlbaNova universitetscentrum, Fysikum, SE - 106 91 Stockholm, Sweden Department ... |
43fa99da407a9fb0 | The Quantum Harmonic Oscillator with Time-Dependent Boundary Condition in the Causal Interpretation
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Requires a Wolfram Notebook System
One of the challenging aspects of quantum mechanics is to derive the classical world from the quantum world. In this Demonstration, we ... |
bae4b5b2f1cf15ec | [[Image(picture_11.png, 700px, class=align-center)]]
This nanoHUB "topic page" provides an easy access to selected nanoHUB educational material on computational electronics that is openly accessible.
* [http://www.nanohub.org/contribute/Contribute content] by uploading it to the nanoHUB. (See "Contribute Content") o... |
12ecd7881a405c72 | digplanet beta 1: Athena
Share digplanet:
Applied sciences
Schematic representation of evanescent waves propagating along a metal-dielectric interface. The charge density oscillations, when associated with electromagnetic fields, are called surface plasmon-polariton waves. The exponential depend... |
ec1ad531e315ed2f | Quantum Gravity and String Theory
1307 Submissions
[11] viXra:1307.0171 [pdf] replaced on 2014-12-23 08:12:32
Toward a Unified Treatment of Space and Time
Authors: Patrick S. Walters
Comments: 24 Pages. 5 Figures. Major revision from previous version.
A brief background to the problem of relativistic compatibility... |
303f67b3b048eebb | , Volume 43, Issue 10, pp 1233-1251
Date: 14 Sep 2013
The Pauli Exclusion Principle. Can It Be Proved?
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The modern state of the Pauli exclusion principle studies is discussed. The Pauli exclusion principle can... |
e51716a88baa0a92 | Viewpoint: A not-so-steady state
• Carsten A. Ullrich, Department of Physics and Astronomy, University of Missouri, Columbia, MO 65211, USA
Physics 3, 47
Theory that takes into account the time-dependent nature of electronic transport through a quantum dot reveals fluctuations that could affect rapid switching of na... |
cb6e5710ab3506a3 | Take the 2-minute tour ×
I am reading Arthur Jaffe's Introduction to Quantum Field Theory. (You can find it here.) There is an interesting question posed in Exercise 2.5.1:
Solutions to the Klein-Gordon equation propagate with finite speed. But $f^t$ instantly spreads from its localization at the origin [...] Does th... |
2aa08488849bec81 | From Wikipedia, the free encyclopedia
Jump to: navigation, search
Hydrogen, 1H
Hydrogen discharge tube.jpg
Purple glow in its plasma state
Hydrogen Spectra.jpg
Spectral lines of hydrogen
General properties
Name, symbol Hydrogen, H
Pronunciation /ˈhdrəən/[1]
Appearance colorless gas
Hydrogen in the periodic table
Hydro... |
caeb8f89b0f136e9 | Fokker–Planck equation
From Wikipedia, the free encyclopedia
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A solution to the one-dimensional Fokker–Planck equation, with both the drift and the diffusion term. In this case the initial condition is a Dirac delta function centered away from zero velocity. Over time the distribution widens... |
eb865cc676cd769d | Wave–particle duality
From Wikipedia, the free encyclopedia
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Wave–particle duality is the concept that every elementary particle or quantic entity may be partly described in terms not only of particles, but also of waves. It expresses the inability ... |
8cdbd84378777ec2 | Take the 2-minute tour ×
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One possible hidden variable theory is that the hidden variable is just the positions of all the particles. In that case for the ground state the probability distribution for position doesn't change. So it is easy to make... |
0ea4d0d16202908f | Sabulski-Reimann conjecture
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During history, many people have wondered: "Could Jesus microwave a burrito so hot that he himself could not eat it?" The Sabulski-Riemann conjecture states that while "on one hand he could, there is a slight pos... |
0f58a94f9d86a7e6 | The trouble with the aufbau principle
Generations of teachers are misleading their charges by teaching a sloppy version of the aufbau principle, claims Eric Scerri
The use of the aufbau principle to predict electronic configurations of atoms, and therefore explain the layout of the periodic table, is a key point whe... |
eff50fc02d7c66db | About this Journal Submit a Manuscript Table of Contents
Advances in High Energy Physics
Volume 2011 (2011), Article ID 259025, 62 pages
Review Article
Holography at Work for Nuclear and Hadron Physics
Asia Pacific Center for Theoretical Physics and Department of Physics, Pohang University of Science and Technology, ... |
f762c4fc6bbc2419 | This is a good article. Click here for more information.
Period 1 element
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Period 1 in the periodic table
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (polyatomic nonmet... |
7a929e4cbbfc6dc6 | To capture the dynamics of a system, constraints are put forward to form a closed set of equations:
1. First the quantities describing system need to be consistent;
2. Then the idea of conservation laws should hold by logic, or belief;
3. Consistency and compatibility conditions may be necessary beyond conservat... |
8b99d498df96b37e | Nonlinear Schrödinger equation: looking for new waves
The nonlinear Schrödinger equation is one of the most important and most studied equations in mathematical physics. It is a relatively simple and compact model which provides a paradigmatic description of nonlinear waves in a variety of physical systems: water wave... |
2ac3017c00420ff5 | Correlated Rotational Alignment Spectroscopy
Visualizing Rotational Wave Packets (superposition of spherical harmonics)
Attached below is a Python script to display spherical harmonics and spherical harmonic superpositions. Spherical harmonics are the angular wavefunctions (“eigenfunctions”) used to describe rotation... |
48440b4bdfba02d5 | 4.2.55. VIBROT
The program VIBROT is used to compute a vibration-rotation spectrum for a diatomic molecule, using as input a potential computed over a grid. The grid should be dense around equilibrium (recommended spacing 0.05 au) and should extend to large distance (say 50 au) if dissociation energies are computed.
... |
4e2b0e7c357a1926 | Sektion Physik, Universität München, Theresienstr. 37, D-80333 München, Germany
Department of Physics, University of Niš, P. O. Box 224, 18001 Niš, Yugoslavia
Steklov Mathematical Institute, Gubkin St. 8, GSP-1, 117966, Moscow, Russia
Institute of Physics, P. O. Box 57, 11001 Belgrade, Yugoslavia
We consider t... |
0087c13f9beea9d9 | Skip to main content
Chemistry LibreTexts
Particle in a Sphere
• Page ID
• Particle on a sphere is one out of the two models that describe rotational motion. A single particle travels on the surface of the sphere. Unlike particle in a box, the particle on a sphere requires angular momentum, \(J\).
There is ... |
2a9b8ec884f81bee | Search This Blog
Friday, December 16, 2016
Lunar Solation Time
Since ancient times, peoples have used the winter solstice to begin each new year but really both the sun and the moon tell time, just very differently. While Sol tells the very precise time of the atomic clock, Luna tells a much fuzzier time with her fu... |
6e05b8cbe2f8e5da | 6 The hydrogen atom
Using the time-independent Schrödinger equation with the potential energy term V = –e2/r, where e is the absolute value of the charge both of the electron and of the proton, we again find that bound states exist only for specific values of the total energy E. These are exactly the values that Bohr ... |
f116974dd21f6085 | Dephasing of a non-relativistic quantum particle due to a conformally fluctuating spacetime
Paolo M Bonifacio, Charles H. T. Wang, J. Tito Mendonca, Robert Bingham
Research output: Contribution to journalArticle
12 Citations (Scopus)
We investigate the dephasing suffered by a non-relativistic quantum particle with... |
0ddb29f18f15269e | We will assume that the eigenfunctions form a complete set so that any function can be written as a linear combination of them. They can be said to form a basis set in terms of which … For any given physical problem, the Schrödinger equation solutions which separate (between time and space), are an extremely important ... |
1511e8a3c78c8465 | Friday Squid Blogging: Diplomoceras Maximum
Diplomoceras maximum is an ancient squid-like creature. It lived about 68 million years ago, looked kind of like a giant paperclip, and may have had a lifespan of 200 years.
Read my blog posting guidelines here.
Posted on November 27, 2020 at 4:33 PM140 Comments
vas pup... |
3f7c18da9bae008e | Interference of a thermal Tonks gas on a ring
Kunal K. Das M.D. Girardeau E.M. Wright Ewan.W Optical Sciences Center and Department of Physics, University of Arizona, Tucson, AZ 85721
November 17, 2020
A nonzero temperature generalization of the Fermi-Bose mapping theorem is used to study the exact quantum stat... |
eaee88fae23be48d | Physics Std. Model “hits the wall” at LHC
If you are uninterested in quantum physics, bail out now.
This is an interesting video about the current state of the art of the Physics Standard Model. It seems the Large Hadron Collider has been trying for 2 years to stir the pot, but nothing has happened after the Higgs Bo... |
a3b097bca0722a98 | loading page
Controlling Quantum Wave Packet of Electronic Motion on Field-Dressed Coulomb Potential of H2+ by Carrier-Envelope Phase-Dependent Strong Field Laser Pulses
• Mohammad Noh Daud
Mohammad Noh Daud
University of Malaya
Author Profile
Solving numerically a non-Born-Oppenheimer time-dependent Schrödinger e... |
7ce24278aa65512b |
Macroscopic dynamics of a trapped Bose-Einstein condensate in the presence of 1D and 2D optical lattices
M. Krämer, L. Pitaevskii and S. Stringari Dipartimento di Fisica, Università di Trento, and Istituto Nazionale per la Fisica della Materia, I-38050 Povo, Italy Kapitza Institute for Physical Problems, ul. Kosygin... |
d2ab1bab3ce3f9a6 | May 15, 2019
How to describe nuclear properties ab initio at a low computational cost?
Figure 1: Reach of ab initio methods: quasi-exact methods (orange), valence-space methods (green) and wave-function expansion methods (red).
The predictions of nuclear properties based on a realistic description of the strong inter... |
45a847abcd1d4c8c | Mathematical Problems in Engineering
Mathematical Problems in Engineering / 2019 / Article
Research Article | Open Access
Volume 2019 |Article ID 2781437 | 21 pages |
Prediction of Ship Cabin Noise Based on RBF Neural Network
Academic Editor: Roberto G. Citarella
Received18 Nov 2018
Revised13 Mar 2019
Accepted25 M... |
fc1f3b613876d64b | Composite Vector Particles in External Electromagnetic Fields
Composite Vector Particles in External Electromagnetic Fields
Zohreh Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA William Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge... |
b2f1723d2a89cb10 | TY - JOUR AB - Quantum illumination uses entangled signal-idler photon pairs to boost the detection efficiency of low-reflectivity objects in environments with bright thermal noise. Its advantage is particularly evident at low signal powers, a promising feature for applications such as noninvasive biomedical scanning o... |
b3aaff9b77bf85eb | Who was Erwin Schrödinger?
When you think about Austrian physicist Erwin Schrödinger, your mind may first turn to his famous thought experiment surrounding a poisoned cat in a box. However, as part of his contributions to quantum mechanics, he is often most celebrated for devising the ‘Schrödinger equation’.
During t... |
40d6e6bd84ec43c4 |
Bilinear recurrences and addition formulae for hyperelliptic sigma functions
Harry W. Braden, Victor Z. Enolskii and Andrew N.W. Hone School of Mathematics, University of Edinburgh, James Clerk Maxwell Building, Kings Buildings, Mayfield Road, Edinburgh EH9 3JZ, U.K. E-mail: Department of Mathematics, Heriot-Watt ... |
8c2e31699316c26d | open search form
The Mathematics of Flow
The ways in which water meanders through rivers or makes its way through pipes to your kitchen sink is much more complex than you might think. Mathematicians have been trying to model the flow of water and air for centuries in a field known as fluid dynamics, but according to ... |
598df2a897fce251 | Download Chapter_2 - Experimental Elementary Particle Physics Group
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823f77282656b996 | Do all quantum trails inevitably lead to Everett?
I’ve been thinking lately about quantum physics, a topic that seems to attract all sorts of crazy speculation and intense controversy, which seems inevitable. Quantum mechanics challenges our deepest held most cherished beliefs about how reality works. If you study t... |
e903b92ebbc45bb9 | Hydrogen atom
From Infogalactic: the planetary knowledge core
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Hydrogen atom
Hydrogen 1.svg
Hydrogen atom
Name, symbol protium,1H
Neutrons 0
Protons 1
Nuclide data
Natural abundance 99.985%
Isotope mass 1.007825 u
Spin 12+
Excess energy 7288.969± 0.001 keV
Binding energy 0.000± 0.0000 keV
... |
751e9488c66a6dfa | My professor told us that in quantum mechanics a transformation is a symmetry transformation if $$ UH(\psi) = HU(\psi) $$
Can you give me an easy explanation for this definition?
In a context like this, a symmetry is a transformation that converts solutions of the equation(s) of motion to other solutions of the equa... |
179412214f51c861 | Skip to main content
Chemistry LibreTexts
10.5: The \(\pi\)-Electron Approximation of Conjugation
• Page ID
• Molecular orbital theory has been very successfully applied to large conjugated systems, especially those containing chains of carbon atoms with alternating single and double bonds. An approximation intro... |
f61feeb8a65a9ca0 | San José State University
Thayer Watkins
Silicon Valley
& Tornado Alley
A Matrix Version of the Hartree-Fock
Method Applied to a Helium Atom
The Hamiltonian function for the two electrons of a helium atom is easy to specify. Let p1 and p2 be the momentum of the electrons. The kinetic energy of the atom is then
K = p... |
2c72540a42d1e13d | Einstein, Schrödinger, and the story you never heard
How “faith” in the Universe destroyed two brilliant men of genius.
“I don’t like it, and I’m sorry I ever had anything to do with it.” -Schrödinger
The idea that if only we’re smart and clever enough, we can predict how the Universe will unfold, goes back long, lo... |
097f2486785c6990 | Skip to content
Classical probability does not apply to quantum systems (causal inference edition)
James Robins, Tyler VanderWeele, and Richard Gill write:
Neyman introduced a formal mathematical theory of counterfactual causation that now has become standard language in many quantitative disciplines, but not in phy... |
025aea06b4ae0cba | ‘Quantum Mechanics’ as the Mechanics of the Time Region
Reciprocity, Volume XXIV, Number 1, Spring 1995, p. 1–9; Revised Feb. 1998
The preliminary results of a critical study of the Wave Mechanics carried out in the light of the knowledge of the Reciprocal System of theory have been reported earlier.1 Some of its imp... |
88a2c815cca29eea | Get access
Wave Packet Defocusing Due to a Highly Disordered Bathymetry
Address for correspondence: André Nachbin, IMPA, Estrada Dona Castorina 110, Jardim Botânico, Rio de Janeiro, RJ, Brazil, CEP 22460-320; e-mail:
Slowly modulated water waves are considered in the presence of a strongly disordered bathymetry. P... |
a54d743faf112c3f | Singularity structure of Møller - Plesset perturbation theory
D. Z. Goodson and A. V. Sergeev
Møller-Plesset perturbation theory expresses the energy as a function E(z) of a perturbation parameter, z. This function contains singular points in the complex z-plane that affect the convergence of the perturbation series... |
5015949ef1b96884 | Scientists achieve reliable quantum teleportation for first time
A mass of optic equipment rigged by the research team at Delft to guide photos between the entangled particles.
Hanson lab/Delft University of Technology
Albert Einstein once told a friend that quantum mechanics doesn't hold water in his scientific wor... |
33a6cc97784198df | Big Bad Quantum Computer Revisited
A recent DefenseNews article again put Shor's algorithm front and center when writing about Quantum Computing. Yet, there is so much more to this field, and with Lockheed Martin working with D-Wave one would expect this to be an open secret in the defence sector. At any rate, this ... |
3cd397b9883d8162 | Take the 2-minute tour ×
In Feynman's book "Quantum Mechanics and Path Integrals" Feynman states that
the probability $P(b,a)$ to go from point $x_a$ at time $t_a$ to the point $x_b$ at the time $t_b$ is $P(b,a) = \|K(b,a)\|^2$ of an amplitude $K(b,a)$ to go from $a$ to $b$. This amplitude is the sum of contributions... |
6d017a651526cd58 | Skip to main content
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Dirac, Paul Adrien Maurice
(b. Bristol England, 8 August 1902; d. Miami, Florida, 20 October 1984)
quantum mechanics, relativity, cosmology.
Dirac was one of the greatest theoretical physicists in the twentieth century. He is best known for his important and elegant contribution... |
dad53d267955c555 | Sunday, June 28, 2015
Thinking outside the quantum box
Doctor: Don't tell me you're lost too.
Shardovan: No, but as you guessed, Doctor, we people of Castrovalva are too much part of this thing you call the occlusion.
Doctor: But you do see it, the spatial anomaly.
Shardovan: With my eyes, no — but, in my philoso... |
90b50f50768c794b | Nicholas Saunders
Divine Action and Modern Science
Saunders, Nicholas, Divine Action and Modern Science, Cambridge University Press, 2002, 234pp, $22.00 (pbk), ISBN 0521524164.
Reviewed by Thomas Tracy , Bates College
The last twenty years have seen a remarkable renewal of interest in the relation of religion and s... |
c88b5fb189617a5c | . – Quantum Mechanics
Text under revision. Not yet approved by academic staff.
To understand the conceptual crisis and fundamental experiments that led to the
formulation of quantum mechanics. To understand its axiomatic bases. To learn to
solve nonrelativistic quantum mechanical problems using perturbative and nonpert... |
d60a6d3899bb26c4 | Quantum mechanics and de Broglie's concept
Quantum mechanics is a probabilistic theory that has been developed in an abstract phase space on the scale of the atom size $\sim 10^{-10}$ m. The formalism of quantum mechanics is based on the Schrödinger and Dirac equations. Quantum mechanics can predict/calculate stable e... |
ceb3457916f013f4 | How to Solve the Particle in a Box Problem
In quantum mechanics, the particle in a box is a conceptually simple problem in position space that illustrates the quantum nature of particles by only allowing discrete values of energy. In this problem, we start from the Schrödinger equation, find the energy eigenvalues, an... |
6c6911bed76317ad | You are currently browsing the tag archive for the ‘compact attractor’ tag.
I’ve just uploaded to the arXiv my paper “A global compact attractor for high-dimensional defocusing non-linear Schrödinger equations with potential“, submitted to Dynamics of PDE. This paper continues some earlier work of myself in an attempt... |
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