chash stringlengths 16 16 | content stringlengths 267 674k |
|---|---|
5761a634d20d965b | Chemistry between semantics and pragmatics - History...
Chemistry between semantics and pragmatics
In philosophy and science, a stereotype is widely spread that true science does not study what it must be, and then what it is. On this score, a classic Scottish enlightener from XVIII century D. Hume, who refused to re... |
2d786fe981c77c7d |
Consistent quantum theory (CQT) was introduced over 25 years ago by Robert Griffiths (1984), and further elaborated by Gell-Mann and Hartle (1993). This theory is a version of orthodox quantum mechanics based in the principle of complementarity. Complementarity is the essence of quantum mechanics, at the center of th... |
c23eec37cb698855 | Uniqueness of positive solutions to some coupled nonlinear Schrödinger equations
Juncheng Wei Wei Yao
We study the uniqueness of positive solutions of the following coupled nonlinear Schrödinger equations: \begin{eqnarray*} \Delta u_1-\lambda_1 u_1+\mu_1u_1^3+\beta u_1u_2^2=0\quad in\quad R^N,\\ \Delta u_2-\lambda_2u_2... |
19f6beb099521840 | Thursday, October 04, 2007
Quantum Mechanics and Objective Reality
Frank Luger headshot by Frank Luger
The main features of quantum theory, such as the wave function, the uncertainty principle, wave-particle duality, indeterminacy, probabilistic behavior, exchange forces, spin, quarks and their various flavors and c... |
e7afb127d8ea1336 | Eigenvalues and eigenvectors
From Wikipedia, the free encyclopedia
(Redirected from Eigenvalue)
Jump to navigation Jump to search
In linear algebra, an eigenvector or characteristic vector of a linear transformation is a non-zero vector that changes by only a scalar factor when that linear transformation is applied... |
f36e6fd41b2bfc28 | Accurate numerical solution of the Schrödinger and Dirac wave equations for central fields. Nature of problem: This subroutine package provides numerical solutions of the Schrodinger and Dirac equations for central fields such that V(r)->0 when r-> infinity and rV(r) is finite for r=0. Radial wave functions, eigenvalue... |
d5c053507734d269 | Double Slit Trouble.
And so the blog finally drags on to the point where I have to start talking quantum again. Quantum mechanics is a hell of a thing; it’s both complex and hugely counterintuitive, and it isn’t helped by many of the popular misconceptions about it such as Schrodinger’s cat. I originally wanted to exp... |
16020313f1f5c3f5 | So when combining atomic orbitals to form molecular orbitals, you can either add the wave functions or subtract them. But at the same time, orbitals can exist in opposite phases (say one lobe of the p orbital is '+' and the other '-'). So what happens when you subtract two 1s orbitals of opposite phase, is that the sam... |
da67466541bd2e40 | Binding Quiddities
Excerpt from The Combination Problem for Panpsychism (2013) by David Chalmers
[Some] versions of identity panpsychism are holistic in that they invoke fundamental physical entities that are not atomic or localized. One such view combines identity panpsychism with the monistic view that the universe... |
924755bf2a49e62e | Wolfram Blog
Michael Trott
An Exact Value for the Planck Constant: Why Reaching It Took 100 Years
May 19, 2016 — Michael Trott, Chief Scientist, Wolfram|Alpha Scientific Content
Blog communicated on behalf of Jean-Charles de Borda.
Some thoughts for World Metrology Day 2016
Please allow me to introduce myself
I’m ... |
2eefe094f06876e9 | There was excitement at the European Physics Society conference in Grenoble, France last week as physicists gathered to review evidence for the detection of the Higgs particle. With the latest data, the LHC is finally returning on its investment while the Tevatron at Fermilab is bravely battling on before its imminent ... |
80a763a2497b26d1 | Call For Abstract
Session 1Organic and Inorganic Chemistry
The word "organic" means something very different in chemistry than it does when you're talking about produce and food. Organic compounds and inorganic compounds form the basis of chemistry. The primary difference between organic compounds and inorganic compo... |
a326f48ff5e6d170 | Meet The Scientists
hubbleEdwin Hubble is sometimes regarded as the greatest astronomer of all time, mainly because of his contributions in the fields of extragalactic astronomy and observable cosmology. Many of his findings include discovering nebulae outside of our galaxy, created a system of classifying galaxies, c... |
e8980b0e1c39de05 | Saturday, 25 October 2008
In a way it is easier to solve the time-dependent Schrödinger equation than the time-independent one. If you don't look too closely at H, it is a first order ordinary differential equation. And not even an eigenvalue problem.
If H is constant over time the solution is:
You are probably use... |
3f5ec729379f7e25 | Fermi contact interactions evaluated from hidden relations in the Schrödinger equation
Wednesday, November 12, 2008 - 4:00pm - 5:00pm
Lind 305
Daniel Chipman (University of Notre Dame)
Fermi contact interactions between electrons and nuclei govern important properties such as the hyperfine coupling constants observed ... |
5d651cafad47db06 | Planck's constant
From Citizendium, the Citizens' Compendium
Jump to: navigation, search
This article is a stub and thus not approved.
Main Article
Related Articles [?]
Bibliography [?]
External Links [?]
Citable Version [?]
The Planck constant (denoted h) is a natural constant named after Max Planck, one of the ... |
cb083deeab80f5af | lördag 26 september 2015
Volkswagen Emission Scandal vs German Political Correctness Leadership
Germany with Angela Merkel is actively seeking to take the leading role in a giant transformation of the world economy into a new green economy with reductions of CO2 emissions to preindustrial levels as prime goal. In th... |
0e343d035573c8a0 | Dismiss Notice
Join Physics Forums Today!
Radius of Benzene
1. Jun 26, 2003 #1
Does anyone here know what the radius of a benzene molecule is?
2. jcsd
3. Jun 26, 2003 #2
The distance between C1 and C4 is about 3.8 A. by my calculations. If you want to check that, the C-C bond length is 1.397 A.
oo... |
fbde23cad3481b4b | Saturday, July 26, 2014
Continuing Human Evolution: Fallacies and Prospects
Where are we going, and where do we want to go, genetically speaking?
Of all the politically correct stances, the genetic unimprovability of humanity is perhaps the most inviolable. Even while we work daily, even feverishly, to improve other... |
661567d431d3c3df | Saturday, August 31, 2013
FOR THE FUTURE OF LENR by Abd ul-Rahman Lomax
Peter has asked me to write a “guest editorial in which you tell what YOU suggest as he best ideas and most recommended modes of thinking- for the future you wish to LENR.”
I'm tempted to dismantle this, so I'll get that out of the way first:
T... |
ce8ae7d99f8064e9 | Friday, 1 June 2007
Schrödinger equation
The Schrödinger equation is be pretty basic stuff but it is pretty cool. This is how it comes from the energy conservation law:
We start out with de Broglie (and the theory of relativity)
and we know that all particles are also waves, a typical wave equation being
Just for t... |
cb5b07418e6fe4fa | Time Really Passes, Science Can’t Deny That
08 Feb 2016
STI is pleased to share with its community this paper by Professor Nicolas Gisin (Is Science Compatible with Our Desire for Freedom?), presented at the Conference "Time in Physics" at the ETH-Zurich (September 2015) and recently published online.
STI Experts
P... |
606999f21dcbba0a | Reactivity (chemistry)
From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
In chemistry, reactivity is the impetus for which a chemical substance undergoes a chemical reaction, either by itself or with other materials, with an overall release of energy.
Reactivity refers to:
• the chemical rea... |
021bf66852c0f2b4 | Dissertation binding oxford
dissertation binding oxford
Cooler Master Hyper 612 Ver2 review - hardwareheaven
That limit suggests the choice of an atomic wave function as an approximate form for the wannier function, the so-called tight binding approximation. Second quantization edit modern explanations of electronic... |
b1ad80b95e993745 | måndag 30 januari 2017
Towards a Model of Atoms
In my search for a realistic atom model I have found the following pieces:
1. Atom in ground state as harmonic oscillator: 3d free boundary Schrödinger equation: realQM.
2. Radiating atom as harmonic oscillator with small Abraham-Lorentz damping: previous post and M... |
7b4682e8c908ead9 |
2Physics Quote:
-- Kathrin Altwegg and the ROSINA Team
Saturday, August 16, 2008
Phase Transitions of Dirac Electrons in Bismuth in a High Magnetic Field
N. Phuan Ong
[This is an invited article based on recent works of the authors.
-- 2Physics.com]
Authors: N. P. Ong, Lu Li, Joseph G. Checkelsky and R. J. Cava... |
5a0ebda43978b374 | Quantum number
From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Quantum numbers describe values of conserved quantities in the dynamics of a quantum system. In the case of electrons, the quantum numbers can be defined as "the sets of numerical values which give acceptable solutions to the Schrö... |
f294af729ace3180 | The Strong Force doesn't exist
20 août 2016
Electromagnetic Nuclear Physics
B. Schaeffer,
Nuclear Scattering is electric at low kinetic energy and magnetic at high kinetic energy.
The electric and magnetic forces were discovered qualitatively 2 millenaries ago by Thales, and quantitatively by Coulomb and Poisson, ... |
c7e33a06b501acfd | Technology & Digital - Where Will Quantum Computers Create Value—and When?
Related Expertise: Data and Analytics, Digital, Technology, and Data, Quantum Computing
Where Will Quantum Computers Create Value—and When?
By Matt LangioneCorban Tillemann-DickAmit Kumar, and Vikas Taneja
Master the New Logic of Competition... |
e1944fcad8117815 | The photon wavefunction
Original post:
In my previous posts, I juxtaposed the following images:
Animation 5d_euler_f
Both are the same, and then they’re not. The illustration on the left-hand side shows how the electric field vector (E) of an electromagnetic wave travels through space, but it does not show the acc... |
b059551bbfea621e | Potential Vortex volume 1
This book proves to be a journey of adventure to readers committed to and interested in the science of nature. The new field of potential vortices is introduced by demonstrative examples from the area of vortex physics. By the example of dielectric losses of capacitors, the vortex decay is ve... |
14babc592a6a2e67 | The Truth About "Homeopathic" Medicine (#23)
[Audio version]
The Truth About "Homeopathic" Medicine (#23)
[Text version]
There are a few potential explanations…
For more material like this article, check out:
The 4-Hour Body
Gout: The Missing Chapter and Explanation
Leave a Repl... |
75fe5e55da395efb | Solid-state physics
From Wikipedia, the free encyclopedia
(Redirected from Solid state physics)
Jump to navigation Jump to search
Solid-state physics is the study of rigid matter, or solids, through methods such as quantum mechanics, crystallography, electromagnetism, and metallurgy. It is the largest branch of con... |
b96748d8e7f78157 | Fault-tolerant quantum computation by anyons
A. Yu. Kitaev
L.D.Landau Institute for Theoretical Physics,
117940, Kosygina St. 2
e-mail: kitaev @ itp.ac.ru
A two-dimensional quantum system with anyonic excitations can be considered as a quantum computer. Unitary transformations can be performed by moving the excitatio... |
03710e088b0ff7c7 | Skip to main content
Fractional Odd-Dimensional Mechanics
The classical Nambu mechanics is generalized to involve fractional derivatives using two different methods. The first method is based on the definition of fractional exterior derivative and the second one is based on extending the standard velocities to the f... |
a2d61468610b3afe | Spatial search by quantum walk
Andrew M. Childs Jeffrey Goldstone Center for Theoretical Physics
Massachusetts Institute of Technology
Cambridge, MA 02139, USA
Grover’s quantum search algorithm provides a way to speed up combinatorial search, but is not directly applicable to searching a physical database. Neverth... |
6392d5eb731f1b4d | TY - GEN AB - We determine an asymptotic formula for the number of integral points of bounded height on a blow-up of $\mathbb{P}^3$ outside certain planes using universal torsors. AU - Wilsch, Florian Alexander ID - 9034 T2 - arXiv TI - Integral points of bounded height on a log Fano threefold ER - TY - JOUR AB - We co... |
884dc5539dc0bee3 |
Bohmists & segregation of primitive and contextual observables
What is the pilot wave theory?
It is not surprising in any way that the new, Bohmian equation for "X(t)" can be written down: it is clearly always possible to rewrite the Schrödinger equation as one real equation for the squared absolute value (pr... |
9872bb15d040d0ef | From the Schrödinger Equation to the Uncertainty Principle
Last time, we walked through some of the history of quantum mechanics and came out with the Schrödinger Equation, the master equation of nonrelativistic quantum mechanics. Much of what we’ll do in this course will involve solving this equation in a variety of ... |
122eb8809bd99344 | Skip to main content
Simulating Coherent Control with Spectroscopic Accuracy
Final Report Summary - COCOSPEC (Simulating Coherent Control with Spectroscopic Accuracy)
Molecules are fundamental building blocks of the world around us and consist of atoms bound together by shared electrons. The particles which constitu... |
5b5de053b7f52b05 | And The Light-Cone Description of M5-branes
N. Lambert***On leave of absence from King’s College London.E-mail address: and P. RichmondE-mail address:
Theory Division, CERN
1211 Geneva 23, Switzerland
Department of Mathematics, King’s College London
The Strand, London WC2R 2LS, UK
In 1007.2982 a novel system of ... |
a2a26b0fc953d936 | Understanding the Hippocampus Visually
1 Comment
I have always enjoyed looking at images that display biological systems in terms of their functional components. But oftentimes, existing diagrams show too much detail, too little detail, the wrong types of detail, or confusing captions/explanations. This seems especia... |
20587f9522d4330f | Quantum theory of observation
The quantum theory of observation consists in studying the processes of observation with the tools of quantum physics. Both the observed system and the observer system (the measuring apparatus) are considered as quantum systems. The measurement process is determined by their interaction a... |
461859e489cd99ff | component level design is concerned with
For example, for ‘average’ plants of similar capacity, the annual O&M cost for a cyclone-fired boiler is slightly higher than that for a tangentially fired boiler. The model includes a term for changes in operational profile, with a variable component, a4. Table 14.2. Data desi... |
a41b109469ec1b26 | Exact solutions in general relativity
In general relativity, an exact solution is a Lorentzian manifold equipped with certain tensor fields which are taken to model states of ordinary matter, such as a fluid, or classical nongravitational fields such as the electromagnetic field. These tensor fields should obey any re... |
d9296f2ac43551ad | From Wikipedia, the free encyclopedia
(Redirected from Molecules)
Jump to: navigation, search
3D (left and center) and 2D (right) representations of the terpenoid molecule atisane
A molecule (pron.: /ˈmɒlɪkjuːl/) is an electrically neutral group of two or more atoms held together by covalent chemical bonds.[1][2][3]... |
c5fa1e3e8240cdf8 | Horizon: Before the Big Bang
• Andrei Linde: Multiverse inspired eternal inflation
• Lee Smolin: Black Holes spawning baby universes
• Michio Kaku: Vacuum fluctuation from empty space
• Neil Turok: Colliding Branes
• Laura Mersini Houghton: String cosmology
60 Responses to Horizon: Before the Bi... |
f42360843ca6bdf2 | Take the 2-minute tour ×
When trying to solve the Schrödinger equation for hydrogen, one usually splits up the wave function into two parts:
$\psi(r,\phi,\theta)= R(r)Y_{l,m}(\phi,\theta)$
I understand that the radial part usually has a singularity for the 1s state at $r=0$ and this is why you remove it by writing:
... |
23d4c73b4d219155 | Nobel Prizes and Laureates
Nobel Prizes and Laureates
The Nobel Prize in Physics 1965
Sin-Itiro Tomonaga, Julian Schwinger, Richard P. Feynman
Share this:
Nobel Lecture
Nobel Lecture, December 11, 1965
The Development of the Space-Time View of Quantum Electrodynamics
We have a habit in writing articles publishe... |
3b84cbe20350b9d4 | Thursday, February 15, 2007
Top 5 German/Austrian physicists in chemistry
Many physicists made major contributions in the field of theoretical chemistry. Because of the abundance of such physicists I decided to restrict this list to German and Austrian physicists. The 5 physicists were ofcourse the pioneers of quantu... |
428d64d930678520 |
Please see
The One-Dimensional Finite-Difference Time-Domain (FDTD) Algorithm Applied to the Schrödinger Equation
The code below illustrates the use of the FDTD algorithm to solve the one-dimensional Schrödinger equation for simple potentials. It only requires Numpy and Matplotlib.
All the mathematical details are ... |
5ada3ae3b57326b3 | On Determinism
By Sean Carroll | December 5, 2011 10:19 am
Back in 1814, Pierre-Simon Laplace was mulling over the implications of Newtonian mechanics, and realized something profound. If there were a vast intelligence — since dubbed Laplace’s Demon — that knew the exact state of the universe at any one moment, and k... |
2733c1a71c80f1b6 | A Voyage to the Kernel, Day 9
The study of secret communication systems has lured people of all ages. And the old methods of encrypting messages are quite popular even in literature. But our interest is centred around two aspects-cryptography and cryptanalysis. Cryptography, in plain words, is concerned with the desig... |
e024b19a380fe300 | Journal of Fluid Mechanics
On a fourth-order envelope equation for deep-water waves
Peter A. E. M. Janssen a1
a1 Applied Mathematics, California Institute of Technology, Pasadena, CA 91125 1
Article author query
janssen pa [Google Scholar]
The ordinary nonlinear Schrödinger equation for deep-water waves (found... |
606742a32bf1a7c6 | Take the 2-minute tour ×
I'm trying to get to grips with the Schrödinger equation by looking at a free particle. I'm certain at some point I massively misunderstood something.
According to a textbook and a lecture the free particle moving in positive x direction can be described by
$$ \Psi(x,t) = A e^{i(kx - \omega ... |
c5d56f747710e152 | Take the 2-minute tour ×
Lets say we have a finite square potential well like below: finite well
This well has a $\psi$ which we can combine with $\psi_I$, $\psi_{II}$ and $\psi_{III}$. I have been playing around and got expressions for them, but they are not the same for ODD and EVEN solutions but lets do this only ... |
3d127dfdfef65a14 | Take the 2-minute tour ×
I have solved the Schrödinger equation for a triangular well potential and the solution comes in terms of Airy functions...now i am facing the following problems: What are the normalization constants of Airy functions?
What are the asymptotic forms Airy functions?
How to find the matrix elem... |
f54bbb0c82414d3e | Take the 2-minute tour ×
I'm not sure if this is the right place to ask a question about the Schrödinger equation, but I'll take my chances anyway. Basically, I would like to know how one can set up a potential function that represents a double-slit barrier and then solve the Schrödinger equation for this potential. O... |
69918e803480bee6 |
by John Holbo on January 21, 2014
I find this confusing. (via Gizmodo.)
For the first time I’m going to write the following sentence. The top YouTube comment link is helpful. Or would be, if I were good at math. I trust.
Belle and I agree that the sleight of hand comes at 3:11 when he ‘shifts it along a little bit... |
75d5b588d19a2339 | Identical particles
Quantum Mechanics
Identical particles: Introduction
Identical particles cannot be distinguished by means of any intrinsic properties. This can lead to effects that have no classical analog. Two particles are identical if there are no interactions that can distinguish them. Therefore a physical ob... |
4b290a16bcf76b2a | Thursday, August 17, 2017
Is time an illusion?
Albert Einstein
Physicists sometimes deny the reality of irreversible time and consider it an illusion, a psychological phenomenon. In a letter of condolence written in 1955, Einstein said this: ...the distinction between past, present and future is only an illusion, alt... |
04c51ac41f20b405 | Forum for Science, Industry and Business
Sponsored by: 3M
Search our Site:
Closing In On Quantum Chemistry
An impressionistic view of why quantum computers are needed for exact solutions of the electronic structures of large molecules: as basis sets (the information needed to describe the orbital states of ea... |
207d34ca84fb51e6 | An Easy Explanation of the Basics of Quantum Mechanics for Dummies
Basics of Quantum Mechanics for Dummies
Next time when a physics professor says that the probability of your position at any given time, in the whole universe, is never zero, don't think he has lost his marbles. This is where we can start with an expla... |
ce3e78a19a60cfbc | Saturday, June 30, 2007
Impressions from the Loops '07
The Loops 2007 this year was held at the University in Morelia, Mexico, in a very nice building (see also Stefan's previous post). The auditorium had a stage with the speaker being in the spotlight, the seats were very comfortable to doze off, and the hallways ha... |
014804303c062e50 | SSM: a set of subprograms for calculating eigenvalues for a diatomic molecule using a simplified shooting method. This paper describes a set of subprograms to calculate accurate eigenvalues of the radial Schrödinger equation using a recent simplified shooting method. A total of nine subprograms were written to deal wit... |
9a91f1fcacdb3f5c | Citation for this page in APA citation style. Close
Mortimer Adler
Rogers Albritton
Alexander of Aphrodisias
Samuel Alexander
William Alston
Louise Antony
Thomas Aquinas
David Armstrong
Harald Atmanspacher
Robert Audi
Alexander Bain
Mark Balaguer
Jeffrey Barrett
William Belsham
Henri Bergson
George Berkeley... |
536b3fca4c05b6c6 | Facebook Twitter Instagram YouTube
Experimental Investigations of Quantum Mechanics
Observing the Heisenberg Uncertainty Principle in the Laboratory
The Cindy Regal group is so skillful at using laser light to track the position of a tiny drum that researchers have been able to observe a limit imposed by the Heisenb... |
ec6e3a34f0057fb5 | tisdag 23 juni 2015
QM on Shaky Ground, Still after 90 Years
Solway Conference 1927
14 kommentarer:
1. Is it so strange that it's hard to formulate a physical theory that works at the planck scale given how many orders of magnitude we are from being able to do experiments on that scale? There is presumably new p... |
eb799bbaabaf32cd | What Does Quantum Physics Actually Tell Us About the World?
The Unfinished Quest for the Meaning of Quantum Physics
By Adam Becker
370 pp. Basic Books. $32.
Are atoms real? Of course they are. Everybody believes in atoms, even people who don’t believe in evolution or climate change. If we didn’t have atoms, how coul... |
60a234f2005d2959 | Initial conditions in quantum mechanics
• Thread starter springwave
• Start date
• #1
I'm doing an undergraduate introductory course in quantum mechanics, and I'm having a hard time understanding the interpretation. I've recently learned about the famous "Particle in a box" problem, in which we solve the time-i... |
35c49fc0200c66ef | Physicists Just Reversed Time on The Smallest Scale by Using a Quantum Computer -
It's easy to take time's arrow for granted - but the gears of physics actually work just as smoothly in reverse. Maybe that time machine is possible after all?
Researchers from Russia and the US teamed up to find a way to break, or at l... |
ebacd650d43b5b3c | You are here
I. What is Analogy? 1. The Common Meaning of the Word Analogy 2. Analogy and Logic 3. Analogy and Metaphysics - II. Analogy in Aristotelian-Thomistic Logic and Metaphysics 1. Analogy of Attribution or Simple Proportion 2. Analogy of Proper or Intrinsic Proportionality 3. Analogy of Improper, Extrinsic, ... |
0565c6b2f3b2fff0 | Getting Nothing for Something (and Vice Versa)
Energy isn’t conserved. It can be — and is — created and destroyed. Your high school physics teacher lied to you. Or, more likely, your high school physics teacher was mistaken. And your college physics professor was probably mistaken too.
Just to be clear: this isn’t a ... |
6da1ef0cf255585e | Wednesday, April 29, 2015
What could be the origin of p-adic length scale hypothesis?
The argument would explain the existence of preferred p-adic primes. It does not yet explain p-adic length scale hypothesis stating that p-adic primes near powers of 2 are favored. A possible generalization of this hypothesis is tha... |
e9946f9a275f0c11 | Monday, January 18, 2010
Twenty four questions
Lubos Motl provided his own answer to Sean Carroll's 24 questions. Lubos answered these questions as a super string fanatic. In the following I will do the same as a TGD fanatic;-).
1. What breaks electroweak symmetry?
Lubos gives the text book answer: the electroweak ... |
a9571b2f23c8fe58 | Numerical solution of PDE:s, Part 7: 2D Schrödinger equation
Haven’t been posting for a while, but here’s something new… Earlier I showed how to solve the 1D Schrödinger equation numerically in different situations. Now I’m going to show how to calculate the evolution of a 2D wavepacket in a potential energy field tha... |
bf8528531bd32054 | Links For July 2014
The Koran talks about a mysterious immortal figure named Khidr who travels the Middle East and hangs out with prophets. And the passages about him seem to have inspired some of the Jewish folk tales about Elijah I heard growing up.
Scientists find the gene that causes an entire family to be morbid... |
71ef53be11bfe342 | Dismiss Notice
Join Physics Forums Today!
Recording of data stopping interferrence pattern
1. Jan 7, 2013 #1
About mid-way through this video it is explained that the doubleslit experiment was conducted with detectors turned on but simply not recording data, the result of which was an interference pattern. The... |
ea29d56251ac6798 | Oscillator, harmonic
From Encyclopedia of Mathematics
Jump to: navigation, search
A system with one degree of freedom whose oscillations are described by the equation
$$\ddot x+\omega^2x=0.$$
The phase trajectories are circles, the period of the oscillations, $T=2\pi/\omega$, does not depend on the amplitude. The p... |
7c7d84fa82123529 | Saturday, July 28, 2007
I am guilty of frequently using physics speech in daily life, an annoying habit I also noticed among many of my colleagues [1]. You'll find me stating "My brain feels very Boltzmannian today", or "The customer density in this store is too high for my metastable mental balance". I have a friend... |
f7d2f76707cb39e9 |
Sign up
Here's how it works:
1. Anybody can ask a question
2. Anybody can answer
I am only asking this question so that I can write an answer myself with the content found here:
and here:
I learned about these pages in a comment to this answer by Ron Maimon. I think Ron Maimon is the original writer of this co... |
4ba0ec18552f5f96 | Take the 2-minute tour ×
I have the following equations describing the electron field in a (classic) electromagnetic field:
$$ c\left(\alpha _i\right.{\cdot (P - q(A + A_b) + \beta mc) \psi = E \psi } $$
where $A_b$ is the background field and $A$ is the one generated by the local Dirac field
I presume that the equ... |
094567a3f701c944 | Thursday, January 17, 2013 ... Français/Deutsch/Español/Česky/Japanese/Related posts from blogosphere
Sean Carroll, Copenhagen, and consensus
The recently published poll about the interpretations of quantum mechanics was discussed by Sean Carroll under this dramatic title:
The Most Embarrassing Graph in Modern Physi... |
b9e7e5b501f523f0 | Take the 2-minute tour ×
Is randomness based on lack of knowledge or behavior of universe is true random?
Or in other words,
are the allegation by EPR about hidden variable in the QM theory justifiable? What evidence can disprove/prove EPR?
share|improve this question
The question is very vast and more philosophica... |
fb7be4e054b8be76 | Take the 2-minute tour ×
At the end of this month I start teaching complex analysis to 2nd year undergraduates, mostly from engineering but some from science and maths. The main applications for them in future studies are contour integrals and Laplace transform, but of course this should be a "real" complex analysis c... |
1efdd9220803ff8d | The Full Wiki
Quantum mechanics: Map
Wikipedia article:
Map showing all locations mentioned on Wikipedia article:
Quantum mechanics (QM) is a set of principles describing the physical reality at the atomic level of matter (molecules and atoms) and the subatomic (electrons, protons, and even smaller particles). The... |
3dc9b44d6edf2ff7 | SciELO - Scientific Electronic Library Online
númeroESPUso de analogías para el "aprendizaje sustentable": El caso de la enseñanza de los niveles de organización en sistemas biológicos y sus propiedades emergentes índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas ... |
4ca06510374d55b5 | Higgs field: Wikis
(Redirected to Higgs mechanism article)
From Wikipedia, the free encyclopedia
Quantum field theory
Feynmann Diagram Gluon Radiation.svg
Feynman diagram
History of...
In particle physics, the Higgs mechanism is a theoretical framework which explains how the masses of the W and Z bosons arise th... |
63d7d8efa4ea202e | Take the 2-minute tour ×
Let's have wave-function $\lvert \psi \rangle$. The full probability is equal to one:
$$\langle \Psi\lvert\Psi \rangle = 1.\tag{1}$$
We need to introduce time evolution of $\Psi $; we know it in the initial moment of time. So it's naturally set
$$\lvert \Psi (t) \rangle = \hat {U}|\Psi (0) ... |
be3fdc598e670631 |
Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
Form of the Lagrangian
1. Nov 23, 2015 #1
I know this has been asked before: "Why is there a negative in the Lagrangian: L = T - V"
I have read the answers and am not happy with them so I tried to formulate my own justification and now ask if an... |
76b5802fd58480c2 | Simulating real-time Floquet photodressing with first principles photoemission spectroscopy
Umberto De Giovannini, Nano-Bio Spectroscopy Group and ETSF, Universidad del País Vasco, CFM CSIC-UPV/EHU, 20018 San Sebastián, Spain
Michael Sentef, Max Planck Institute for the Structure and Dynamics of Matter and Center for ... |
a1ec462ef01784db | Prof. Martin Moskovits: Just how devoid of cultural, racial, gender and national tarnish is Science as an approach to understanding the physical world?
Emre Discekici and the Fall 2016 Dow Distinguished Lecturer, Prof. Martin Moskovits.
“No amateur has the right to have deep opinions about the areas in which they a... |
2a414e006017da9c | Thursday, August 13, 2009
Released: mpmath 0.13
I released mpmath 0.13 today. See the announcement for details. Soon coming to a Sage or SymPy near you!
I've blogged extensively about the new features that went into this version over the last two months. The short version of the changelog is "lots of special functio... |
6255d42fc9c7f5b2 | torsdag 11 augusti 2016
New Quantum Mechanics 16: Relation to Hartree and Hartree-Fock
The standard computational form of the quantum mechanics of an atom with N electrons (Hartree or Hartree-Fock) seeks solutions to the standard multi-dimensional Schrödinger equation as linear combinations of wave functions $\psi (x... |
ce571ede0473352c | Skip to main content
Disorder enhanced vibrational entanglement and dynamics in polaritonic chemistry
Collectively coupling molecular ensembles to a cavity has been demonstrated to modify chemical reactions akin to catalysis. Theoretically understanding this experimental finding remains an important challenge. In p... |
6c79aca17b4f19e1 | Scott Aaronson has one of the highest intelligence/pretension ratios I’ve ever encountered. I wasn’t really aware of him before last fall, when I attended a conference at New York University on an ambitious new theory of consciousness, integrated information theory. Most speakers touted IIT or tried to tease out its im... |
de6ebe19734dba81 | Search This Blog
Monday, April 8, 2019
Theory of Everything
If a person and the earth were both growing in size and gravity was shrinking at the same rate, the person could not tell since what they say and felt would not change. Growing matter and shrinking gravity would then explain gravity as long as gravity decre... |
fc7dcba22517e01c | « first day (3503 days earlier) last day (29 days later) »
1:30 AM
@skullpatrol Idk I haven't talked to him in a while. He's at princeton though so I bet he's busy.
@SirCumference Hey man hows everything did you graduate?
@ACuriousMind Not surprising what he's done amidst the pandemic considering his massive ego... |
9084d70c87fed062 | Piotr Bizón (Jagiellonian University, Kraków): Dynamics in Spatially Confined Hamiltonian Systems
Lecture Course (442637 VO): April 20 - May 25, 2020
Time: Monday, 13:45 - 15:15
Start: Monday, April 20, 2020
End: Monday, May 25, 2020
The subject of lectures is propagation of nonlinear waves in the presence of spati... |
35d551551a0be264 | Stringent Constraints on Neutron-star Radii from Multimessenger Observations and Nuclear Theory
Measuring neutron star radii
Fig. 1
Neutron stars are the densest stellar objects that we can observe in the cosmos, and are arguably the most interesting astrophysical objects in the multimessenger era. The properties of... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.