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7513dd6d5a53527e | You are currently browsing the tag archive for the ‘Larry Guth’ tag.
Just a brief post to record some notable papers in my fields of interest that appeared on the arXiv recently.
• A sharp square function estimate for the cone in {\bf R}^3“, by Larry Guth, Hong Wang, and Ruixiang Zhang. This paper establishes an o... |
983397241d56d680 | Math Science Chemistry Economics Biology News Search
> Bohr and quantum’s atomic model Issue: 2012-3 Section: 14-16
Bohr’s atomic model was introduced in 1913 by Niels Bohr. Bohr atom is a planetary model, where the electrons are in stationary circular orbits and the electrons orbit the nucleus at set d... |
500ab1bde26b9b32 | Schrödinger potentials solvable in terms of the general Heun functions
A. M. Ishkhanyan
Research output: Contribution to journalArticlepeer-review
30 Citations (Scopus)
We show that there exist 35 choices for the coordinate transformation each leading to a potential for which the stationary Schrödinger equation is... |
bfc6d3fd59d39263 | Séminaires de l’année 2018
Séminaire du LPTMS: Nicolas Cherroret
Novel perspectives from Anderson localization of atomic matter waves
Nicolas Cherroret (Laboratoire Kastler-Brossel, Université Pierre et Marie Curie)
In the last decades, the field of atom optics has allowed for accurate experimental investigations... |
931618e7e178b19e | Abstracts for Thursday Philosophy of Physics seminars
October 15th
Kian Salimkhani, University of Cologne
The Dynamical Approach to Spin-2 Gravity
Abstract: In this presentation I study how the spin-2 approach to gravity helps to strengthen Brown and Pooley’s dynamical approach to general relativity. In particular, ... |
8c3fa6e826e1e2ca | 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... |
3e8f4cf07fb563a0 | Created by Materia for OpenMind Recommended by Materia
Start How to Film an Electron: the Chemistry of the Improbable
20 November 2018
How to Film an Electron: the Chemistry of the Improbable
Estimated reading time Time 3 to read
This is an improbable story. Improbable because until less than a decade ago it seemed ... |
0807a9f7fc70011c | Take the 2-minute tour ×
Sometimes (often?) a structure depending on several parameters turns out to be symmetric w.r.t. interchanging two of the parameters, even though the definition gives a priori no clue of that symmetry.
As an example, I'm thinking of the Littlewood–Richardson coefficients: If defined by the ske... |
e169a337668dca36 | « · »
Section 8.2: The Quantum-mechanical Free-particle Solution
Please wait for the animation to completely load.
In order to tackle the free-particle problem, we begin with the Schrödinger equation in one dimension with V(x) = 0,
[−(ħ2/2m)∂2Ψ(x,t)/∂x2 = (∂/∂t)Ψ(x,t) . (8.2)
We can simplify the analysis somewha... |
9d98e4822fbc95cf | 2007 Schools Wikipedia Selection. Related subjects: General Physics
Physics (from the Greek, φύσις (phúsis), "nature" and φυσική (phusiké), "knowledge of nature") is the science concerned with the discovery and understanding of the fundamental laws which govern matter, energy, space and time. That is, physics deals wi... |
2ad2da962ea3db52 | You are here
The Equations: Icons of Knowledge
Sander Bais
Harvard University Press
Publication Date:
Number of Pages:
[Reviewed by
David M. Bressoud
, on
The world is awash is popularizations of modern physics. Here is one more. The author writes clearly and incisively about the physical ideas, but so have other ... |
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
share|improve this question
... |
8a3f54687e90c1be | Is electric charge truly conserved for bosonic matter? | PhysicsOverflow
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f5da0bc6eaefb27d | Stochastic differential equation
From Wikipedia, the free encyclopedia
(Redirected from Stochastic differential equations)
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Early work on SDEs was done to describe Brownian motion in Einstein's famous paper, and at the same time by Smoluchowski. However, one of the earlier works r... |
3aa595bf8c494afb | All quantum operations must be unitary to allow reversibility, but what about measurement? Measurement can be represented as a matrix, and that matrix is applied to qubits, so that seems equivalent to the operation of a quantum gate. That's definitively not reversible. Are there any situations where non-unitary gates m... |
63fae86ddb06e827 |
Jean-François Bougron
Quantum formalism and non-equilibrium Repeated Interaction Systems
Wednesday, 14 November, 2018 - 17:00
Résumé :
Starting from common knowledge in quantum mechanics, this talk will introduce a simplified version of the quantum formalism. More precisely, I will recall basic facts about the wav... |
74ee46500e92d91a | Thursday, March 21, 2019
actual infinite falling (all-)together &/or chaosmos COLLAPSE
Musée d'Orsay/January 2018 (for more A/Z photography see portfolio here);
Clara Colosimo in Fellini's Prova d'orchestra;
Arquipélago dos Pombos Correios (o soverdouro);
The great abyss inframince (by A/Z, for more see here);
"... ... |
53140565e9192559 | All Issues
Volume 6, 2019
Volume 3, 2016
Volume 2, 2015
Volume 1, 2014
Journal of Computational Dynamics
December 2019 , Volume 6 , Issue 2
Special issue in honor of Reinout Quispel
Select all articles
Preface Special issue in honor of Reinout Quispel
Elena Celledoni and Robert I. McLachlan
2019, 6(2): ⅰ-ⅴ do... |
095369f65599d582 |
DOE/ER/40561-205-INT95-00-92 UW/PT 95-05
Effective Field Theories
Lectures given at the Seventh Summer School in Nuclear Physics: “Symmetries”
Institute for Nuclear Theory, June 19 - 30, 1995
David B. Kaplan Email:
Institute for Nuclear Theory, NK-12
University of Washington
Seattle WA 98195, USA
Three lectu... |
cabf0fee14825b8a | Friday, June 28, 2019
Quantum Supremacy: What is it and what does it mean?
Rumors are that later this year we will see Google’s first demonstration of “quantum supremacy”. This is when a quantum computer outperforms a conventional computer. It’s about time that we talk about what this means.
Before we get to quantum... |
f2b01806b903a51c |
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What is the reason for the observation that across the board fields in physics are generally governed by second order (partial) differential equations?
If someone on the street would flat out ask me that question, then I'd probably... |
d9fd53210d00ed0d | Take the 2-minute tour ×
The Schrödinger equation describes the quantum mechanics of a single massive non-relativistic particle. The Dirac equation governs a single massive relativistic spin-½ particle. The photon is a massless, relativistic spin-1 particle.
What is the equivalent equation giving the quantum mechanic... |
3ac7ce6583434e63 | Heat equation
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In this example, the heat equation in two dimensions predicts that if one area of an otherwise cool metal plate has been heated, say with a torch, over time the temperature of that area will gradually dec... |
a74f5a729ef5b643 | The Many Worlds Interpretation of Quantum Mechanics and the Emperor’s New Clothes
Encountering the Many Worlds Interpretation
Several years ago, I looked into the Many Worlds Interpretation (MWI) of quantum mechanics and concluded that it was not on the right track. It seemed to be creating more conceptual and tech... |
e94a518cfa9f41fa | Monday, July 15, 2013 ... Français/Deutsch/Español/Česky/Japanese/Related posts from blogosphere
Bohmian mechanics, a ludicrous caricature of Nature
A constraint that defines Bohmian mechanics is simple: it should be a classical theory that emulates quantum mechanics as well as it can. The champions of the Bohmian... |
048d05e91715075c | Resonant States in Negative Ions
by Brandefelt, Nicklas
Abstract (Summary)
Resonant states are multiply excited states in atoms and ions that have enough energy to decay by emitting an electron. The ability to emit an electron and the strong electron correlation (which is extra strong in negative ions) makes these st... |
33bf18d94abad22a |
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Nanoelectronic Modeling Lecture 20: NEGF in a Quasi-1D Formulation
By Gerhard Klimeck1, Samarth Agarwal2, Zhengping Jiang2
1. Purdue University 2. Electrical and Computer Engineering, Purdue University, West Lafayette, IN
Published on
This lecture will introduce a spat... |
dbee22084e8ea081 | Take the 2-minute tour ×
We all learn in grade school that electrons are negatively-charged particles that inhabit the space around the nucleus of an atom, that protons are positively-charged and are embedded within the nucleus along with neutrons, which have no charge. I have read a little about electron orbitals and... |
6f82ed52515b92a2 | Take the 2-minute tour ×
I'm a mathematician with only the basic knowledge of Physics, so my question may be trivial: in this case, mercy me. :-)
My questions are:
Many thanks in advance.
share|improve this question
I do not dare to give the answer. But I can point out why $V$ is named like that. To me, it s... |
900b581fef4ea6c2 | Thursday, 17 March 2016
Why biology is so hard! The 'peculiarly difficult position' of the Biologist: an analysis of Zinssers' view of the sciences.
This essay was submitted in partial fulfillment of my degree of Bachelor of Science (Honours), Department of Zoology, The University of Western Australia (June 2001). I ... |
10c8c055c429cf08 | Thursday, June 30, 2016
1- Change is not merely necessary to life - it is life. ( Alvin Toffler)
2- Change is the process by which the future invades our lives. (Alvin Toffler)
3- Man has a limited biological capacity for change. When this capacity is overwhelmed, the capacity is in future shock. (Alvin Toffler) ... |
fff02574615626ce | Wave function
From Wikipedia, the free encyclopedia
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In quantum mechanics, the Wave function, usually represented by Ψ, or ψ, describes the probability of finding an electron somewhere in its matter wave. To be more precise, the square of the wave function gives the probability of fin... |
fdca52e96357439a | Laser stripping of hydrogen atoms by direct ionization
Brunetti, E and Becker, W and Bryant, H C and Jaroszynski, D A and Chou, W (2015) Laser stripping of hydrogen atoms by direct ionization. New Journal of Physics, 17. ISSN 1367-2630
Text (Brunetti-etal-NJP2015-Laser-stripping-of-hydrogen-atoms)
Final Published Ver... |
1b1f284efd332669 |
• 5
$\begingroup$ Order this book, take two weeks off work and enjoy: amazon.co.uk/Emperors-New-Mind-Concerning-Computers/dp/… $\endgroup$ – MoonKnight May 8 '13 at 14:27
• 14
• 1
$\begingroup$ Possible duplicate: physics.stackexchange.com/q/7/2451 $\endgroup$ – Qmechanic May 8 '13 at 15:00
• 3
$\... |
7807014919f6624f | For an observable $A$ and a Hamiltonian $H$, Wikipedia gives the time evolution equation for $A(t) = e^{iHt/\hbar} A e^{-iHt/\hbar}$ in the Heisenberg picture as
$$\frac{d}{dt} A(t) = \frac{i}{\hbar} [H, A] + \frac{\partial A}{\partial t}.$$
From their derivation it sure looks like $\frac{\partial A}{\partial t}$ is ... |
c65df020773b0109 | PhD Paul Tiwald
Local Electronic Excitations in Extended Systems: A Quantum-Chemistry Approach
Real solids and surfaces are not "perfect". Crystals inevitably contain various defects and surfaces are subject to interactions with ambient particles leading, for example, to oxidation and adsorption. Since such effects ... |
05526fb6c6342a6f | Application of Scale Relativity to the Problem of a Particle in a Simple Harmonic Oscillator Potential
Journal of Quantum Information Science
Vol.07 No.03(2017), Article ID:79131,12 pages
Saeed N. T. Al-Rashid1, Mohammed A. Z. Habeeb2, Khalid A. Ahmed3
1Physics Department, College of Pure Science, University of A... |
1d1c78be08d1d189 | Download One photon stored in four places at once Please share
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5d46d62b9bb97e25 | Transparent boundary conditions
Figure 2. Transparent boundary conditions.
Gauge invariance was discovered in the development of classical electromagnetism and was required when the latter was formulated in terms of the scalar and vector potentials. It is now considered to be a fundamental principle of nature, stati... |
91f5327f2f7fe068 |
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Why do we consider evolution of a wave function and why is the evolution parameter taken as time, in QM.
If we look at a simple wave function $\psi(x,t) = e^{kx - \omega t}$, $x$ is a point in configuration space and $t$ is the evo... |
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Suppose I have a wave function $\Psi$ (which is not an eigenfunction) and a time independent Hamiltonian $\hat{\mathcal{H}}$. Now, If I take the classical limit by taking $\hbar \to 0$ what will happen to the expectation value $\lan... |
e874f318f174c8ad | Maximal theorems and Calderón-Zygmund type decompositions forthe fractional maximal function
by Kuznetsov, Evgeny, PhD
Abstract (Summary)
A very significant role in the estimation of different operators in analysis is played by the Hardy-Littlewood maximal function. There are a lot of papers dedicated to the study of... |
52457ec2466ec530 | RRI Digital Repository >
07. Theoretical Physics >
Research Papers (TP) >
Title: Dirac quantization of parametrized field theory
Authors: Varadarajan, Madhavan
Issue Date: 16-Feb-2007
Publisher: The American Physical Society
Citation: Physical Review D, 2007, Vol.75, 044018
Abstract: Parametrized field theory (PFT) i... |
21927ed0b62993a4 | Wolfram Blog
S M Blinder
Centenary of Bohr’s Atomic Theory (1913–2013)
December 30, 2013 — S M Blinder, Wolfram Demonstrations Project
I had intended to write a treatise describing the history of the hydrogen atom over the last 100 years. Unfortunately, my time is running out this year, so I will content myself inst... |
410b739d3ea356f5 | Chemical Sciences: A Manual for CSIR-UGC National Eligibility Test for Lectureship and JRF/Eckart conditions
From Wikibooks, open books for an open world
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The Eckart conditions[1] simplify the molecular Schrödinger equation that arises in the second step of the Born-Oppenheimer approximatio... |
f1be1fb4ad7634e3 | Take the 2-minute tour ×
After reading about the hydrogen atom and understanding how Schrodinger's equation explains most part of the atomic spectrum of an hydrogen atom, and also came to know that, it explains most of the chemical reactions and a huge tool in chemistry.
I am now almost convinced, that it is wise to ... |
7f06daead7b1a7b9 | You are here
The Equations: Icons of Knowledge
Sander Bais
Harvard University Press
Publication Date:
Number of Pages:
[Reviewed by
David M. Bressoud
, on
The world is awash is popularizations of modern physics. Here is one more. The author writes clearly and incisively about the physical ideas, but so have other ... |
70443a2dd5d7d871 |
To explain the inverse theorem, let me first discuss the bilinear estimate that it inverts. Define a wave to be a solution to the free wave equation -\phi_{tt} + \Delta \phi = 0. If the wave has a finite amount of energy, then one expects the wave to disperse as time goes to infinity; this is captured by the Strich... |
06bc3c526bb0d004 | General relativity
From Wikipedia, the free encyclopedia
(Redirected from Curvature of space)
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A simulated black hole of 10 solar masses within the Milky Way, seen from a distance of 600 kilometers.
The Einstein field equations are nonlinear and very difficult to solve. Einstein use... |
5921bd54c5dff5d7 | Superficially Dirac spinor resp. Dirac gamma matrices and quaternions and bicomplex numbers seems to be very similar objects.
• all can be expressed by unitary 4x4 matrices so they seem to represent kind of rotation in 4D space.
• all can be expressed as 2x2 matrix of complex numbers
• So are Dirac spinors jus... |
77ef36b9db08772f | The Principle of Least Action re-visited
As I was posting some remarks on the Exercises that come with Feynman’s Lectures, I was thinking I should do another post on the Principle of Least Action, and how it is used in quantum mechanics. It is an interesting matter, because the Principle of Least Action sort of connec... |
31e7cdc749ccf429 | Astrophysics Source Code Library
Making codes discoverable since 1999
Browsing Codes
Results 1-2030 of 2030 (2002 ASCL, 28 submitted)
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[ascl:1505.015] 2dfdr: Data reduction software
[ascl:1808.007] 2DSF: Vectorized Structure Function Algorithm
[ascl:1303.016] 2MAS... |
11519fef5e1f57d9 | Posts Tagged ‘ontology’
The Elusive Object
29 March 2011
Behind the curtain
The Reformed Realist
Some of Bernard d’Espagnat’s best and dearest friends might be realists.
Chapter nine of his On Physics and Philosophy, entitled “Various Realist Attempts,” describes with a perceptible tinge of sorrow how the conventi... |
57c3bae590d436a6 | English polski
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[Abstract = "An implementation of numerical algebraic methods of solving a stationary one-dimensional Schrödinger equation (SODSE) is presented. In the fra... |
35645ada56407a58 | Physics of Complex Systems
Rydberg molecules
Rydberg atoms are true giants in the atomic world with sizes reaching 10 micrometer for n=300 and constitute mesoscopic entities. They allow to probe classical-quantum correspondence and the transition from the quantum to the classical world. They also provide a useful te... |
8be149836d364291 | How Quantum Mechanics and General Relativity Can Be Brought Together
This paper describes an easy and teaching way how quantum mechanics (QM) and general relativity (GR) can be brought together. The method consists of formulating Schrödinger’s equation of a free quantum wave of a massive particle in curved space-time... |
1509b759f8abece3 | Physical Chemistry. The Particle in a Box I: the Schrödinger Equation in One-dimension
In 1926, the Austrian physicist Erwin Schrödinger (1887-1961) made a fundamental mathematical discovery that had a profound impact on the study of the molecular world (in 1933, Schrödinger was awarded with the Nobel prize in Physics... |
7fd6724ab517a7fc | Unlikely site for historic moment in physics: RDU
[John Archibald] Wheeler struggled to mend a rift in physics between general relativity and quantum mechanics—a rift called time. One day in 1965, while waiting out a layover, Wheeler asked colleague Bryce DeWitt [at UNC Chapel Hill] to keep him company for a few hours... |
f9d6a3d1011853b3 | IA Scholar Query: All Labels Are Not Created Equal: Enhancing Semi-Supervision via Label Grouping and Co-Training. https://scholar.archive.org/ Internet Archive Scholar query results feed en info@archive.org Sun, 31 Jul 2022 00:00:00 GMT fatcat-scholar https://scholar.archive.org/help 1440 Industry–Academia Research Co... |
fb804b21ce00f160 | Planned seminars
Room 6.2.33, Faculty of Sciences of the Universidade de Lisboa
Alberto Saldaña
Alberto Saldaña, Universidad Nacional Autónoma de México
Fractional derivatives are commonly used to model a variety of phenomena, but… what does it mean to have a logarithmic derivative? And what would it be used for?
... |
558db06a8d4c57b5 | Increasing the accuracy of quantum-mechanical simulations for strongly correlated functional materials by designing effective Hamiltonians
1. Increasing the accuracy of quantum-mechanical simulations for strongly correlated functional materials by designing effective Hamiltonians
28211 / Many-particle physics, ... |
23b80c9ffac85def | Spectroscopy/Molecular energy levels
Molecular spectroscopy is the study of the interaction of electromagnetic (EM) radiation with matter. It is based on the analysis of EM radiation that is emitted, absorbed, or scattered by molecules, which can give information on:
• chemical analysis (finding a chemical fingerp... |
ace3ed9da116685e | Open access peer-reviewed chapter
Dissipative Solitons in Fibre Lasers
Written By
Vladimir L. Kalashnikov and Sergey V. Sergeyev
Submitted: April 28th, 2015 Reviewed: October 9th, 2015 Published: March 2nd, 2016
DOI: 10.5772/61713
From the Edited Volume
Fiber Laser
Edited by Mukul Chandra Paul
Chapter metrics ... |
a4e93fbee0a3b02a | Israeli brain drain?
Israeli brain drain?
University of Southern California professor Arieh Warshel is pictured at an Oct. 9 press conference for his Nobel Prize in chemistry. (USC photo/Gus Ruelas)
What is behind Israel’s recent string of Nobel Prize winners?
It could be that Israelis have a practical way of think... |
4003cd9b234d887c | 2022-09-25T15:12:37Z https://oai.zbmath.org/v1/
oai:zbmath.org:7562697 2022-07-26T08:45:13Z 35 37 70
Lou, Zhaowei; Si, Jianguo; Wang, Shimin 2022 7562697 English American Institute of Mathematical Sciences (AIMS), Springfield, MO https://zbmath.org/07562697 Content generated by zbMATH Open, such as reviews, classificat... |
db0d0ade929d94df | Schrodinger’s Equation does not calculate the behavior of quantum particles directly. This function is called wave function. In what follows, all wave functions are assumed to be normalized. The wave function Ψ is a mathematical expression. 6 - A photon with a wavelength of 93.8 nm strikes a... Ch. The wave function Ψ ... |
f5aea5284f208ee6 | What happened before the Big Bang?
Why is there space and matter, and why do we feel things (and have free will)?
We know about the Big Bang. It happened. No arguing there. What that means is that we can pretty reliably use mathematical models to extrapolate current states and trends backwards in time to a point to t... |
f005ac1681e48cd6 | University of Thi-Qar
Recent publications
Background To prospectively investigate the role of Fast spin-echo T 2 -weighted (FSE T 2 -w) and diffusion-weighted imaging (DWI) in magnetic resonance imaging (MRI) for detecting spine bone marrow changes in postmenopausal women with osteoporosis (OP). A total of 101 postmeno... |
7c5f31d6f5889191 | Stanford Encyclopedia of Philosophy
Relational Quantum Mechanics
First published Mon Feb 4, 2002; substantive revision Wed Jan 2, 2008
1. Introduction
Quantum theory is our current general theory of physical motion. The theory is the core component of the momentous change that our understanding of the physical wor... |
97bff736d7fb05ec | Quantum Pendulum
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For an idealized classical pendulum consisting of a point mass attached to a massless rigid rod of length attached to a stationary pivot, in the absence of friction and air resistance, the energy is given by
where i... |
cd70a561dc140575 | Contextual emergence
From Scholarpedia
Harald Atmanspacher and Peter beim Graben (2009), Scholarpedia, 4(3):7997. doi:10.4249/scholarpedia.7997 revision #193943 [link to/cite this article]
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Curator: Harald Atmanspacher
Contextual emergence characterizes a specific... |
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Conditions for entanglement to exist
1. Jul 18, 2007 #1
I am interested in the conditions necessary for entangled states to be created. Unfortunately I only have access to introductory QM texts, and they talk about about how entanglement can exists ... |
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... |
e003685cf6627a8d | Blog Hole Memory Rescue and Lost Papers that were Really Lost
There is more than one path to classical mechanics.
So much to do, so little time. My own lost paper work (i.e. the translation of some of Hilbert's old papers that are not available in English) is commencing at a snail's pace, but at Kingsley Jones' blog... |
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Please Clarification Needed!
1. Oct 25, 2004 #1
Please!! Clarification Needed!
As I understand the wave particle duality of quantum mechanics, quanta exhibit both wave and particle properties. They:
(i) exhibit wave properties before being measured, i.e. the p... |
22dbd7f3a10aa5ff | sábado, 22 de mayo de 2010
No existe la menor duda de que Hawking debe su enorme popularidad fuera del mundo de la física porque su nombre se liga-indefectiblemente a la existencia de esos extraños objetos que los científicos han dado en llamar agujeros negros. En un agujero negro se afirma nada sale,ni siquiera la l... |
3b5585fe592cca42 | Quantum mechanics from theory to technology
It is a popular assumption that the macrophysical world is governed by classical, deterministic physics – while the microphysical world is governed by modern physics which is of statistical nature. For everyday phenomenons, it should therefore be sufficient with a basic unde... |
65c685dad7b282c2 | by Brian Tomasik
First published: 21 Feb. 2017; last update: 7 Oct. 2017
This piece sketches my (perhaps inadequate) understanding of type-F monism in the philosophy of mind. I argue that the view is ultimately either a form of type-A physicalism or a form of property dualism (broadly construed). The reasons to rejec... |
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Time dependent transformations
1. Jun 21, 2004 #1
Hey people,
I just finished reading a chapter in a book on quantum mechanics that has deeply disturbed me. The chapter was about symmetry in quantum mechanics. It was divided in two basic parts: time dependent and t... |
0e58b1c7c516206f | Particle in a box
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Some trajectories of a particle in a box according to Newton's laws of classical mechanics (A), and according to the Schrödinger equation of quantum mechanics (B–F). In (B–F), the horizontal axis is position, and the vertical axi... |
a89a416354f157d9 | Open main menu
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Noether's theorem
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First page of Emmy Noether's article "Invariante Variationsprobleme" (1918), where she proved her theorem.
Noether's (first)[1] theorem states that every differentiable symmetry of the action of a physical system has a corresponding co... |
a6a03d3474ae6e3d | Take the 2-minute tour ×
The time is treated differently in special relativity and quantum mechanics. What is the exact difference and why relativistic quantum mechanics (Dirac equation etc.) works?
share|improve this question
Er...time is treated differently in relativistic mechanics and non-relativistic quantum mec... |
21ff9f04b804c8d7 | Low-energy electron diffraction
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Low-energy electron diffraction (LEED) is a technique for the determination of the surface structure of single-crystalline materials by bombardment with a collimated beam of low energy electrons (20–200 eV)[1] and observ... |
3167fb1d614e9871 | Stationary state
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Main articles: quantum state and wavefunction
In quantum mechanics, a stationary state is an eigenvector of the Hamiltonian, implying the probability density associated with the wavefunction is independent of time.[1] This corresponds ... |
70b7acc9f43c4b2a | quantum mechanics
quantum mechanics
quantum mechanics: see quantum theory.
In quantum mechanics, the Hamiltonian H is the observable corresponding to the total energy of the system. As with all observables, the spectrum of the Hamiltonian is the set of possible outcomes when one measures the total energy of a system... |
8d5f296e35ce4cb2 | AskDefine | Define eigenvectors
User Contributed Dictionary
1. Plural of eigenvector
Extensive Definition
In mathematics, a vector may be thought of as an arrow. It has a length, called its magnitude, and it points in some particular direction. A linear transformation may be considered to operate on a vector to... |
cb6e6ca3290081c1 | Uncertainty principle
From Wikipedia, the free encyclopedia
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In quantum mechanics, the uncertainty principle, also known as Heisenberg's uncertainty principle, is any of a variety of mathematical inequalities[1] asserting a fundamental li... |
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IMA Annual Program Year Workshop
Mathematical and Algorithmic Challenges in Electronic Structure Theory
September 29 - October 3, 2008
Eric CancesCERMICS
Anna KrylovUniversity of Southern California
Juan MezaLawrence Berkeley Laboratory
John PerdewTulane... |
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Can anybody give a list of the most fundamental assumptions of quantum mechanics in plain english ?
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what do you mean with assumptions ? – Stefano Borini Nov 10 '10 at 0:39
Just like we have a dimensionless point particle, the constant linear flow of time, and an i... |
1fcae5b6535ce6ba | Shielding of Electrons
in Atoms from H (Z=1) to Lw (Z=103)
When we study the binding energies of electrons in the atoms, we note that each electron is different. The nuclear charge around which it is in orbit, the nature of its orbit and the orbits of all the electrons, create a unique environment which is a sum of ma... |
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For a time dependent wavefunction, are the instantaneous probability densities meaningful? (The question applies for instances or more generally short lengths of time that are not multiples of the period.)
What experiment could demonstrate the existence of a time dependent probability density... |
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Kirsten Stadermann is one such teacher. Although she originally intended to make a career of researching laser physics, she “accidentally” started teaching in Holland when a local school lost a teacher unexpectedly.
“It was such a great experience,” she recalls of her first few months on the jo... |
b049781c23170d5d | Are there any truly dumb questions in physics?
I trade thoughts and correspond occasionally with other interested amateurs and some highly qualified professionals on an internet forum on theoretical physics. While most of the topics raised there are serious, intelligent and thoughtful questions involving complex inte... |
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The usual approach to the chemical bond is to "solve the Schrödinger equation", and this is done by attempting to follow the dynamics of the electrons. As we all know, that is impossible; the equation as usually presented requires you to know the potential field in which every particle mo... |
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Quantum harmonic oscillator
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Title: Quantum harmonic oscillator
Author: World Heritage Encyclopedia
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Subject: Landau quantization, Quantum mechanics, Fractional Schrödinger equation, Wave functio... |
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Cluster decay, also named heavy particle radioactivity or heavy ion radioactivity, is a rare type of nuclear decay in which an atomic nucleus emits a small "cluster" of neutrons and protons, more than in an alpha particle, but less ... |
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