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9476eb8c3fece9d3 | #13: Would You Be Happy in Heaven?
#12: The Stoic Formula for a Good Life
Take a look at the following formula:
It is not the formula for having a happy and meaningful life; it is instead the time-dependent Schrödinger equation. It describes how the quantum state of a physical system changes over time... |
2400164c012072a9 | Take the 2-minute tour ×
I want to solve the time-dependent Schroedinger equation:
$$ i\partial_t \psi(t) = H(t)\psi(t) $$
for matrix, time-dependent $H(t)$ and vector $\psi$.
What is an efficient way of doing this so that it efficiently scales to high-dimensional spaces?
share|improve this question
what are the v... |
197492ef66e57fe6 | Tuesday, 24 January 2012
jQuery | Easy TeX Equations
Here's the Schrödinger equation for a taster:
The method I am about to introduce, uses one of Google's many resources: The Infographics Tool, based on the Chart API.
As mentioned in the API information page, all you need to do to get an equation image, is to g... |
e112ccb3fec3c381 | Take the 2-minute tour ×
Every so often, one sees on this site* or in the news or in journal articles a statement of the form "we have measured a change in such-and-such fundamental constant" (or, perhaps more commonly, "we have constrained the rate of change of..."). These are often shrouded in controversy, with peop... |
a789cf30499c2e00 | Truth, Validity and Usefulness
There are three closely related — but in my opinion distinct — concepts that ought to be closely scrutinized before discussing metaphor proper. (The post is long but I hope you will bear with me: making the points I wanted to make took many more words than I had anticipated.)
Truth is ... |
86fc717675173396 | « · »
Section 7.7: Time Evolution
Pick an n = ; then
Check, then click the "set the state" button to see the alternate visualization.
Please wait for the animation to completely load.
The Schrödinger equation in one dimension,
[−(ħ2/2m)∂2/∂x2 + V(x)] Ψ(x,t) = (∂/∂t) Ψ(x,t), (7.8)
governs the time evolution of q... |
118e507f3f621c01 | onsdag 17 december 2014
The Radiating Atom 8: Towards Resolution of the Riddle
Let us now collect the experience from previous posts in this series: We start recalling Schrödinger's equation for the one electron Hydrogen atom in standard form:
• $ih\dot\Psi +H\Psi =0$, (1)
where $\Psi =\psi +i\phi$ is ... |
e506f32d02f5d16f | Tag Archives: quantum mechanics
Entangling thousands of atoms
Here’s a link to and a citation for the paper,
Capturing the particle and the wave: photographing light
Here’s a link to and a citation for the research paper,
This is an open access paper.
Can the future influence ... |
1f8fb79f59bbc539 | From Eternity to Book Club: Chapter Eleven
By Sean Carroll | March 23, 2010 10:27 am
Welcome to this week’s installment of the From Eternity to Here book club. Part Three of the book concludes with Chapter Eleven, “Quantum Time.”
This distinction between “incomplete knowledge” and “intrinsic quantum indeterminacy” ... |
486273a1ab6e0fba | Galina Perelman: 2 soliton collision in NLS
i \psi_t = – \psi_{xx} + F(|\psi|^2) \psi, ~ x \in R
where $F(\xi) = -2 \xi + O (\xi^2), ~ \xi \rightarrow 0.$
This family of equations has solitary wave solutions
e^{i \theta(x,t) \phi (x – b(t), E)}
where $\theta(x,t) = \omega t + \gamma + v \frac{x}{2}, ~b(t) =vt + c$ (a... |
f0e7cb6ab6ff7602 | Schrödinger's equation — in action
Marianne Freiberger
Schrödinger's equation — in action
In the previous article we introduced Schrödinger's equation and its solution, the wave function, which contains all the information there is to know about a quantum system. Now it's time to see the equation in action, using a ... |
a9c00e4acb390cb4 | Tuesday, May 31, 2011
'Cause you're about to eat my bubbles!
Unless you know my attitude on Seagulls...the references here are a little [read: A LOT] opaque. Nonetheless, I encourage anyone tuning into raineworld to watch the embedded Youtube video Jellyfish. It's absolutely excellent. It's done by Steven Haddock *s... |
57b57d85bbef8f00 | A poll on the foundations of quantum theory
Erwin Schrödinger. Discussions of quantum foundations often seem to involve this fellow's much abused cat.
Erwin Schrödinger. Discussions of quantum foundations often seem to involve his much abused cat.
The group of physicists seriously engaged in studies of the “foundati... |
90cf102521a9139e | Lecture —
A Century of Controversy over the Foundations of Mathematics
[Originally published in C. S. Calude and G. Paun, Finite versus Infinite, Springer-Verlag, 2000, pp. 75-100.]
This 1999 talk at UMass-Lowell was my last major lecture of the previous century, and it summarizes that century's work on the foundatio... |
518a22a8b0a23f7e | Open Access
Scaling properties of ballistic nano-transistors
Nanoscale Research Letters20116:365
DOI: 10.1186/1556-276X-6-365
Received: 5 November 2010
Accepted: 28 April 2011
Published: 28 April 2011
Recently, we have suggested a scale-invariant model for a nano-transistor. In agreement with experiments a clos... |
50bc97371f716743 | Cookies policy
This Week
5 November 2014
Ghost universes kill Schrödinger’s quantum cat
Quantum weirdness is a sign of many ordinary but invisible universes jostling to share the same space as ours, according to a bold new idea
Not as strange as it seems
Not as strange as it seems
(Image: ESO)
THE wave function ... |
9f45f0719d5d0b92 | SciELO - Scientific Electronic Library Online
vol.80 issue1EditorialEducation from a post-post-foundationalist perspective and for post-post-foundationalist conditions author indexsubject indexarticles search
Home Pagealphabetic serial listing
On-line version ISSN 2304-8557
Print version ISSN 0023-270X
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5fdb549d1ce360ab | previous home next PDF
Particles in Two-Dimensional Boxes
Michael Fowler, University of Virginia
Separation of Variables in One Dimension
We learned from solving Schrödinger’s equation for a particle in a one-dimensional box that there is a set of solutions, the stationary states, for which the time dependence i... |
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Electron in potential well equation
1. Oct 22, 2008 #1
Hφ(x) =((p2op)/2m + V(x))φ(x) = (-hbar2/2m.d2/dx2+ V(x)φ(x) = E φ(x)
This equation is supposed to relate to an electron confined in a one-dimensional potential well. I'm really confused about where it comes fro... |
9fdd1a870a80559b | 301 reputation
bio website
location Oslo, Norway
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visits member for 1 year, 7 months
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I am a scientific researcher at Centre of Theoretical and Computational Chemistry at the University of Oslo. I work at the ERC funded project ABACUS, studying mainly the fundamentals of density functional the... |
287881498357e82d | The 11 Most Beautiful Mathematical Equations
While certain famous equations, such as Albert Einstein's E = mc^2, hog most of the public glory, many less familiar formulas have their champions among scientists. LiveScience asked physicists, astronomers and mathematicians for their favorite equations; here's what we fo... |
4264a1e2eb2443e5 | 22 Going relativistic
Formally, the Schrödinger equation can be obtained via the following steps:
• Start with the approximate, non-relativistic relation (2.3.2) between the kinetic energy and the kinetic momentum associated with a particle of mass m.
• Write this in terms of the total energy E, the total momentu... |
356eb88f56756824 | • Corpus ID: 221538111
Derivation of the Generalized Time-independent Schrodinger Equation. The New Stochastic Quantum Mechanics: Think and calculate
title={Derivation of the Generalized Time-independent Schrodinger Equation. The New Stochastic Quantum Mechanics: Think and calculate},
author={Mikhail Batanov-Gauk... |
2c33fd9d9025a206 | Show Summary Details
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Printed from Oxford Research Encyclopedias, Physics. Under the terms of the licence agreement, an individual user may print out a single article for personal use (for details see Privacy Policy and Legal Notice).
date: 04 July 2022
Quantum Error Correctionfree
Quantum Error Correctionf... |
88b116f8b54575d9 | Every so often, one sees on this site* or in the news or in journal articles a statement of the form "we have measured a change in such-and-such fundamental constant" (or, perhaps more commonly, "we have constrained the rate of change of..."). These are often shrouded in controversy, with people often stating quite lou... |
864441596b0aa29d | Posted on
Q Field Science
Quantum Reality Field Science
by Mr. Terry Skrinjar
The QEnergySpa, BEFE and Quantum Reality Field Science
The QEnergySpa, BEFE technology is based on Quantum Reality Field Science or QRFS. The study of quantum field theory is alive and flourishing, as are applications of this method to ... |
f1d84de5eb5766c9 | The Einstein-Podolsky-Rosen Argument in Quantum Theory
First published Mon May 10, 2004; substantive revision Tue Oct 31, 2017
In the May 15, 1935 issue of Physical Review Albert Einstein co-authored a paper with his two postdoctoral research associates at the Institute for Advanced Study, Boris Podolsky and Nathan R... |
0305226157878eea | The Hinterlands
What explains this phenomena? If you would like to read about a theory to explain rogue waves that use LDT (large deviation theory), a bit of nonlinear Schrödinger equation application then click here.While the article does get a bit wonky from time-to-time, it is an easy read. One of the example they... |
a15e889e0b753a0a | Friday, July 31, 2015
5 TeV bump at CMS?
Lubos Motl tells about indications for a bump in dijet spectrum at CMS. The decay to dijets suggests interpretation as a meson like states consisting of exotic quarks. I already told about evidence for a bump at 2 TeV, whose decay signatures suggests interpretation as similar ... |
202897ef3a734ec0 | Decoherence and Trajectories Implied by a Modified Schrodinger Equation
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Requires a Wolfram Notebook System
Decoherence is defined as the emergence of classical behavior through interaction of a quantum system with the environment. It is the most widely accepted explanat... |
a8979aae04f15823 | Nature has a fascinating property, discovered by Max Planck: action is quantized. Or, in simple terms: change occurs in smallest steps.
● Summary: action is quantized
● History and experiments
● How to forget action quantization
● The silence of Feynman - and others
● More fallacies and false counter-arguments
● ... |
445677798c185167 | The Born-Oppenheimer Approximation
The Born-Oppenheimer approximation is the first of several approximations used to simplify the solution of the Schrödinger equation. It simplifies the general molecular problem by separating nuclear and electronic motions. This approximation is reasonable since the mass of a typical ... |
d7b9c7403b0a4fc5 | 29 May 2017 to 1 June 2017
Europe/Paris timezone
Hélène Barucq : Current trends in solving full-wave equations for imaging complex media
Waves have the outstanding faculty of recording characteristics of the medium they go through. By studying their propagation, we can thus obtain all the information that is necessa... |
3e40147128dfab30 | Quantum gravity
Quantum gravity (QG) is a field of theoretical physics that seeks to describe gravity according to the principles of quantum mechanics, and where quantum effects cannot be ignored,[1] such as in the vicinity of black holes or similar compact astrophysical objects, and where the effects of gravity are s... |
6df2c1ec77a8da8c | Advanced Quantum Mechanics
Fall, 2013
Building on Professor Susskind’s previous Continuing Studies courses on quantum mechanics, this course will explore the various types of quantum systems that occur in nature, from harmonic oscillators to atoms and molecules, photons, and quantum fields. Students will learn what ... |
6d029cb57f72e84a | Interpreting Quantum Theory Without Losing Your Marbles: A Look at the Implications of Spontaneous Localization Theories on Physical Reality
As a predictive theory, quantum mechanics has been extraordinarily successful; the successful prediction of the electron's anomalous magnetic moment, for example, is considered o... |
7a7c63599c81c732 | Back in the day
How it all began,
Heisenberg: It starts with Einstein.
Bohr: It starts with Einstein. He shows that measurement—measurement, on which the whole possibility of science depends—measurement is not an impersonal event that occurs with impartial universality. It’s a human act, carried out from a specific ... |
33be6c68a343f3ff | Wednesday, September 21, 2011
Imagining the Ninth Dimension
"The string landscape can be visualized schematically as a mountainous terrain in which different valleys represent different forms for the extra dimensions, and altitude represents the cosmological constant's value."
I've been saying that the eighth dimens... |
d45a368d5be9048a | time evolution operator harmonic oscillator
ELSEVIER 12 September 1994 Physics Letters A 192 (1994) 311-315 Time-evolution of a harmonic oscillator: jumps between two frequencies PHYSICS LETTERS A T. Kiss, P. Adam, J. Janszky ' Research Laboratory for Crystal He also investigated the time evolution of a charged oscill... |
22fcf4930a0e62d6 | Abstracts for Thursday Philosophy of Physics seminars
Week 1, 29 April: Caspar Jacobs (Oxford)
Title: Comparativist Theories and Conspiracy Theories: the no miracles argument against comparativism
Abstract: In order to avoid symmetry-related underdetermination, many philosophers have opted for comparativist theorie... |
8e0703ee78e454f7 | zbMATH — the first resource for mathematics
\(p\)-adic numbers and renormalization of eigenfunctions in quantum mechanics. (English) Zbl 0910.46060
Summary: In this paper we show how \(p\)-adic analysis can be used, in some cases, to treat divergent series in quantum mechanics. We shall consider examples in which the ... |
cb77a1b8acbc028d | JEMAAJournal of Electromagnetic Analysis and Applications1942-0730Scientific Research Publishing10.4236/jemaa.2015.79024JEMAA-59954ArticlesEngineering Physics&Mathematics Convective Schrödinger Equation: Insights on the Potential Energy’s Role to Wave Particle Decay ltairS. de Assis1*HectorTorres-Silva2*GöranT. Marklun... |
57d3150bd386d9b6 | Reduced Mass
Get Reduced Mass essential facts below. View Videos or join the Reduced Mass discussion. Add Reduced Mass to your PopFlock.com topic list for future reference or share this resource on social media.
Reduced Mass
In physics, the reduced mass is the "effective" inertial mass appearing in the two-body proble... |
5c2a0edbcefb91ce | Quantum Lorem Ipsum
I got tired of Lorem Ipsum text and created Quantum Lorem Ipsum, now with 100% more physics jargon!
To those who are not familiar, Lorem Ipsum is a piece of latin text, comprised of multiple paragraphs, that is used as a placeholder during the design process of building a page layout. It allows th... |
2f868142be887ac9 | BLOG 2019 Q3
⦿ PA
British Antarctic Survey research ship Sir David Attenborough is launched. In 2016, the Natural Environment Research Council
held a referendum inviting the public to choose a name for the ship. After a radio campaign, a runaway majority of the votes
were cast for the name Boaty McBoatface. In May 201... |
ae0b2eeb901e5f20 | 30 août 2016 ~ Commentaires fermés
Classical electromagnetic radiation pdf
Classical electromagnetic radiation. Heald M.A., Marion J.B.
Classical electromagnetic radiation
ISBN: 0030972779,9780030972775 | 586 pages | 15 Mb
Classical electromagnetic radiation pdf MnJ60Dx
Download Classical electromagnetic radiatio... |
67fcf8b074213f79 | Saturday, April 03, 2021
Should Stephen Hawking have won the Nobel Prize?
[This is a transcript of the video embedded below.]
Stephen Hawking, who sadly passed away in 2018, has repeatedly joked that he might get a Nobel Prize if the Large Hadron Collider produces tiny black holes. For example, here is a recording o... |
c0df232633bee46c | Open access peer-reviewed chapter
Nonstandard Transition GUE‐GOE for Random Matrices and Spectral Statistics of Graphene Nanoflakes
By Adam Rycerz
Submitted: December 7th 2015Reviewed: May 13th 2016Published: October 12th 2016
DOI: 10.5772/64240
Downloaded: 889
Spectral statistics of weakly disordered triangular... |
9af95fd145d404ca | Physicist, Startup Founder, Blogger, Dad
Tuesday, April 29, 2008
Pop goes the housing bubble
Figure via Calculated Risk. Larger version here
I believe the outlines of the bust are becoming as visible as the bubble itself was to any astute observer a few years ago. But no bottom yet! If I had to guess, I'd say we ar... |
c09cd83813c9f375 | Pomodoro Timer
Well golly-gee! Thanks for taking the time to take a peek at this!
I am posting a link here to a project I wrote on CodePen.io. It’s a pomodoro timer. For those who aren’t familiar, the pomodoro technique is a method that helps people fight procrastination and the fear of starting a project. It does th... |
8c84e7c26c8b3d09 | Feb 272018
Enough of politics and cats. Time to blog about math and physics again.
Back in my high school days, when I was becoming familiar with calculus and differential equations (yes, I was a math geek) something troubled me. Why were certain expressions called “linear” when they obviously weren’t?
I mean, an ex... |
09bf91bfe0d27dfa | Inorganic Chemistry/Chemical Bonding/Orbital hybridization
From Wikibooks, open books for an open world
Jump to: navigation, search
Four sp3 orbitals.
Three sp2 orbitals.
In chemistry, hybridisation (or hybridization) is the concept of mixing atomic orbitals into new hybrid orbitals suitable for the pairing of electr... |
0c82b626041fa407 | All Issues
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0fa8b5c195472073 | Measurement in quantum mechanics
From Wikipedia, the free encyclopedia
Jump to: navigation, search
A measurement always causes the system to jump into an eigenstate of the dynamical variable that is being measured, the eigenvalue this eigenstate belongs to being equal to the result of the measurement.
P.A.M. Dirac (... |
bd60944289098f8e | About this Journal Submit a Manuscript Table of Contents
Advances in Physical Chemistry
Volume 2011 (2011), Article ID 593872, 38 pages
Review Article
Potential Energy Surfaces Using Algebraic Methods Based on Unitary Groups
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Apartado Postal 70-... |
bc4f195471ce9b69 | Sturm–Liouville theory
From Wikipedia, the free encyclopedia
(Redirected from Sturm-Liouville theory)
Jump to: navigation, search
In mathematics and its applications, a classical Sturm–Liouville equation, named after Jacques Charles François Sturm (1803–1855) and Joseph Liouville (1809–1882), is a real second-order... |
0ae879b2e67983e0 | Günter Nimtz
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Günter Nimtz
Born (1936-09-22) 22 September 1936 (age 78)
Nationality German
Fields Physics
Institutions University of Cologne
Alma mater University of Vienna
Günter Nimtz (born 22 September 1936) is a German physicist, working at the 2nd ... |
44900449559a9529 | Take the 2-minute tour ×
We're making a video presentation on the topic of eigenvectors and eigenvalues. Unfortunately we have only reached the theoretical part of the discussion. Any comments on practical applications would be appreciated.
share|improve this question
closed as no longer relevant by Andy Putman, Mar... |
4f58acb88cdc4477 | Quantum mechanics is one of the most successful theories in all of science; at the same time, it's one of the most challenging to comprehend and one about which a great deal of nonsense has been written. However, a paper from Science, titled "Observing the Average Trajectories of Single Photons in a Two-Slit Interferom... |
710cff213bc4a94d | tisdag 21 juni 2016
New Quantum Mechanics 2: Computational Results
I have now tested the atomic model for an atom with $N$ electrons of the previous post formulated as a classical free boundary problem in $N$ single-electron charge densities with non-overlapping supports filling 3d space with joint charge density as ... |
0ee037de155ade79 | • 05/05/2014
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IT Is A Quantum World
System administrators need to take a quantum mechanical view when weighing the probability of new failure modes that come with new technologies such... |
f716e3a9367f4e2e | Hope College Department of Physics and Engineering
Research Experiences for Undergraduates
Summer 2004
Project Summary
Project Title: Physics Curriculum Development: Revisions of Units T, Q and N in the Six Ideas that Shaped Physics Series
Student Name: Jordan Siemon, Ryan Fedewa, Elizabeth Carlson
Students' home ins... |
b614112c060de34a | Take the 2-minute tour ×
I would like to know more about Ehresmann connections in vector bundles and how they relate to the electromagnetic field and the electron in quantum mechanics.
Background: The Schrödinger equation for a free electron is
$$ \frac{(-i\hbar\nabla)^2}{2m} \psi = i\hbar\partial_t \psi $$
Now, to... |
cd5cfbb17d8fde33 | Take the 2-minute tour ×
I realize that path integral techniques can be applied to quantitative finance such as option value calculation. But I don't quite understand how this is done.
Is it possible to explain this to me in qualitative and quantitative terms?
share|improve this question
closed as too broad by ACur... |
caba881e1f1e254a | Take the 2-minute tour ×
I am wondering how fast electrons travel inside of atomic electron orbitals. Surely there is a range of speeds? Is there a minimum speed? I am not asking about electron movement through a conductor.
share|improve this question
from the way you phrase your question you give the impression you ... |
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Teachers Write an Open Textbook In a Weekend Hackathon 109
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da59561cd4a22b7f | All Issues
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f405e1d1dd2128a6 | The first postulate of Quantum Mechanics as I've learned can be stated as:
The states of a quantum system can be described by vectors in a Hilbert space.
I've seem also some people also requiring the Hilbert space be separable. Anyway, the point here is: we are associating a Hilbert space to quantum systems in order ... |
85e5aea278a7e9fe | Wednesday, December 30, 2020
Well, Actually. 10 Physics Answers.
[This is a transcript of the video embedded below.]
Today I will tell you how to be just as annoying as a real physicist. And the easiest way to do that is to insist correcting people when it really doesn’t matter.
1. “The Earth Orbits Around the Sun.... |
b197da616d536346 | Galilean, SE(3), Poincare groups - Central Extension | PhysicsOverflow
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be11fd3210f1f910 | Tagged: Quantum Physics Toggle Comment Threads | Keyboard Shortcuts
• richardmitnick 1:49 pm on July 15, 2017 Permalink | Reply
Tags: An advanced atomic cloud locked up in a small glass cage, Laser light to link caesium atoms and a vibrating membrane, Light 'kicks' object, , QBA-Quantum Back Action, Quantum Phys... |
ba31903910c06761 | Latest Post
Computing All Our Futures
In the 21st Century there is a new age of information and information systems – all of which can ultimately supply recipes for artificial intelligence. In the 1990’s we are told, the US Department of Defense outlayed billions of tax dollars in an alleged attempt to find a solutio... |
51ec141e0130c887 | Take the 2-minute tour ×
I am reading up on the Schrödinger equation and I quote:
Because the potential is symmetric under $x\to-x$, we expect that there will be solutions of definite parity.
Could someone kindly explain why this is true? And perhaps also what it means physically?
share|improve this question
Possib... |
a0904b2b0743796d | Shifts, phase-locked state and chaos in climate data
by David Douglass
Recent studies of observational climate data have shown that Earth’s climate system: has many abrupt climate shifts; is phase locked to an annual cycle of Solar origin; and is chaotic. These phenomena are related and are summarized below.
The cl... |
4c8957bc071e7e8e | Slowly modulated water waves are considered in the presence of a strongly disordered bathymetry. Previous work is extended to the case where the random bottom irregularities are not smooth and are allowed to be of large amplitude. Through the combination of a conformal mapping and a multiple-scales asymptotic analysis ... |
074dc0c896500405 | Quantum Physics
0909 Submissions
[4] viXra:0909.0041 [pdf] submitted on 21 Sep 2009
Authors: Jonathan J. Dickau
Category: Quantum Physics
[3] viXra:0909.0038 [pdf] submitted on 16 Sep 2009
How the Classical World Got Its Localization: an Elementary Account of How the Age of the Universe May be Implicated in the ... |
38e060f539416302 | Tuesday, August 20, 2013
To wear or not to wear my glasses
Ever wondered what people think of you when you’re wearing your glasses. Could wearing glasses change people’s initial impressions of you? Not long ago I seem to remember people (particularly the younger ones) were of the idea that wearing thick, black-rimmed... |
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... |
8384f305df8b9148 | Fritz London
by Frank Field
The title of this little essay says it all: it is a memory after approximately 67 years of a man of whom I stood properly in awe at the time and for whom I have now even greater respect. I should say at the outset that I am writing this completely from memory with no reference to texts o... |
556c62c4bb132896 | 2-D Semiconductors are novel materials in the field of nano-electronics. Their unusual transport properties have led to an extensive research attention towards similar materials. Graphene has carriers that exhibit an effective "speed of light" (106 m/s) in the low energy range of
This research proposes to achieve a co... |
91dec625b1706519 | Schrödinger: the man, his method, and his cat
I've been busy lately working on this semester's term paper on Nuclear Waste Management, so in order to maintain activity on my blog, here's last semester's term paper regarding the life and works of Erwin Schrödinger.
“Even if I should be right in this, I do not know w... |
b1d8e8b5bb45ba9c | The Conservation of Presence
Ted Dace
Abstract. The central puzzle of time is passage in the context of presence. No matter how many moments sequentially participate in presence or “the now,” none carries it with them into history. Somehow, time remains current even as it passes. Like a river continually recharged ... |
340dd8e454cf1c71 | Représentation d’une liaison chimique
Modeling biophysical and biological properties from the characteristics of the molecular electron density, electron localization and delocalization matrices, and the electrostatic potential
The electron density and the electrostatic potential are fundamentally related to the mo... |
da65eae7db4a3329 | Quantum mechanics offers numerous mysteries to ponder for laypeople and physicists alike, but none of these mysteries is more popular among the general public as the famous Schrödinger’s cat experiment. Conceived by Austrian physicist Erwin Schrödinger in 1935, the thought experiment used a hypothetical feline to illus... |
c80098b10ac1a492 | Center for Computational Materials
Research projects within the Center for Computational Materials (CCM) focus on quantum mechanical theory applied to materials. The application of quantum mechanics to materials is a relatively new and exciting field that combines a number of different disciplines. It is often asserte... |
9c39905e4b01ff03 | Dismiss Notice
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Photon / Schrödinger equation
1. Jan 1, 2008 #1
Neither in Sam Treiman's odd quantum nor in van Dommelen's nice online book I was able to find the Schrödinger equation for a photon, i.e. a particle without rest mass. The Schrödinger equation straight from Treiman's book... |
088813b2eb3bebf8 | tisdag 31 maj 2016
Samtal med Kodcentrum om Matematik-IT
Jag har idag haft ett konstruktivt och mycket trevligt samtal med Jessica Berglund och Lisa Söderlund på Kodcentrum om eventuellt samarbete vad gäller att sprida programmeringens evangelium till svenska elever och svensk skola.
Kodcentrum har hittills satsat p... |
5b85704e9b8303a1 | Second Edition of the Textbook
The Front Cover Picture's Message to Principles of Physical Chemistry
A Comment by Hans Kuhn and Horst-Dieter Försterling
The picture symbolizes the importance of inventing simplifying models to treat complex phenomena. Such models are crucial in developing the modern topics considered ... |
3092745bd0159b14 | Take the 2-minute tour ×
I've already posted this question on Physics.SE, but I thougth it could be useful to ask also here.
No problem if moderators will ask me to cancel this thread... But, please, have mercy! :-D
Let $\Omega \subseteq \mathbb{R}^N$ be a domain and let $V,m:\Omega \to \mathbb{R}$ be two measurable... |
1030729bd7b394cf | Take the 2-minute tour ×
I haven't understood this thing: Physics is invariant for CPT trasform...But the Heat or diffusive equation $\nabla^2 T=\partial_t T$ is not invariant for time reversal...but it's P invariant..So CPT simmetry would be violed... What I haven't undestood?
Thank you
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... |
9933ecaa27d65176 | WKB approximation
From Wikipedia, the free encyclopedia
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For other uses, see WKB (disambiguation).
In mathematical physics, the WKB approximation or WKB method is a method for finding approximate solutions to linear differential equations with spatially varying coefficients. It is typically... |
49dbd1c93e0c9037 | Electron magnetic moment
From Wikipedia, the free encyclopedia
(Redirected from Electron magnetic dipole moment)
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"Electron spin" redirects here. See also Electron spin resonance and Spin (physics).
In atomic physics, the electron magnetic moment, or more specifically the electron magneti... |
b567f1677427b638 | From Wikipedia, the free encyclopedia
Jump to: navigation, search
An instanton[1] (or pseudoparticle[2][3]) is a notion appearing in theoretical and mathematical physics. An instanton is a classical solution to equations of motion[note 1] with a finite, non-zero action, either in quantum mechanics or in quantum field ... |
33b144bb16c2eaea | Hulthen potential
From Encyclopedia of Mathematics
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The Hulthen potential [a1] is given by
where is the screening parameter and z is a constant which is identified with the atomic number when the potential is used for atomic phenomena.
The Hulthen potential is a short-range potential whi... |
2a6e870383aeca12 | Take the 2-minute tour ×
For a report I'm writing on Quantum Computing, I'm interested in understanding a little about this famous equation. I'm an undergraduate student of math, so I can bear some formalism in the explanation. However I'm not so stupid to think I can understand this landmark without some years of phy... |
0eb1514734e399b7 | The J Curve
Thursday, March 06, 2008
The Joy of Rockets
A short talk that I gave at TED, under the apt mavericks conference theme:
So many people have contacted me since this video went up to relay how rocketry inspired them in their childhood. Rocket science is tangible.
Here are some recent rocket photos and vid... |
3a68a6359974cb0d | Take the 2-minute tour ×
I read about Fractional Quantum Mechanics and it seemed interesting. But are there any justifications for this concept, such as some connection to reality, or other physical motivations, apart from the pure mathematical insight?
If there are none, why did anyone even bother to invent it?
sha... |
9dd9495fe2f6840b | Sign up ×
Supppose we are given a quantum state that isn't pure state, such that it is a linear combination of the eigenstates of a Hermitian operator $\hat O$. $$|\psi\rangle=N\sum \alpha_i |i\rangle$$ where $N$ is just a normalization constant. I just want to make something clear about measuring. If we measure the c... |
deb7f836d3114f26 | @article{1886, abstract = {Information processing in the sensory periphery is shaped by natural stimulus statistics. In the periphery, a transmission bottleneck constrains performance; thus efficient coding implies that natural signal components with a predictably wider range should be compressed. In a different regime... |
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