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2a59da802b284c00 | Solution of Schrödinger equation for a step potential
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In quantum mechanics and scattering theory, the one-dimensional step potential is an idealized system used to model incident, reflected and transmitted matter wave... |
82dc4b25995ce0a3 | Particle Swarm Optimization and Intelligence Advances and Applications Premier Reference Source 2010
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BOOK Konstantinos E. Parsopoulos_ Michael N. Vrahatis Particle Swarm Optimization and Intelligence Advances and Applications Premier Reference Source 2010
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94c064bcbe7c36a1 | Take the 2-minute tour ×
The Wikipedia article on Moseley's law seems to show that the screening of heavy atoms is by 1 electron charge exactly (in the limit of large Z, experimental precision, within nonrelativistic limits, and).
But why is this exactly one unit? The other K-shell electron is not screening exactly o... |
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De Broglie Waves and Complex Numbers
1. Jan 5, 2008 #1
We used complex variables to describe the wave function. People do that in acoustics and optics too, strictly for convenience, because the real and imaginary parts are rudundant.
The wave fu... |
4d39a40bdaec68ef | Three-dimensional Spatiotemporal Accessible Solitons in a <italic>PT</italic>-symmetric Potential
Three-dimensional Spatiotemporal Accessible Solitons in a PT-symmetric Potential
Journal of the Optical Society of Korea. 2012. Dec, 16(4): 425-431
Copyright ©2012, Optical Society of Korea
• Received : August 17, 2012
... |
5cd671686af3984f | Acceleration Signals From Superconductors
by David Sears Schroeder
What Are Matter Waves
About the Author and Experimental Motivation
Status of Experiments: 10 October, 2016
Hypothetical Warp Drive From Novel Supersymmetry Particles
Revised experimental set-up on 28 March, 2016. Front row, left to right: High vol... |
1a082a38cd884de0 | KLUEDO RSS Feed KLUEDO Dokumente/documents https://kluedo.ub.uni-kl.de/index/index/ Fri, 09 Jan 2015 13:27:20 +0200 Fri, 09 Jan 2015 13:27:20 +0200 Stochastic Modeling and Approximation of Turbulent Spinning Processes https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/4168 In some processes for spinning synthetic ... |
4075a0b23f543e17 | My long, complexity-theoretic journey
So, what was I doing these past few weeks that could possibly take precedence over writing ill-considered blog entries that I’d probably regret for the rest of my life?
1. On the gracious invitation of Renato Renner, I visited one of Al Einstein’s old stomping-grounds: ETH Zürich... |
c1c9449e13c95d03 | Take the 2-minute tour ×
In many areas of mathematics (PDE, Algebra, combinatorics, geometry) when we have difficulty in coming with a solution to a problem we consider various notions of "generalized solutions". (There are also other reasons to generalize the notion of a solution in various contexts.)
I would like t... |
7281940a86f40296 | Guest Blog
Guest Blog
Commentary invited by editors of Scientific American
Are Parallel Universes Unscientific Nonsense? Insider Tips for Criticizing the Multiverse
Although we don’t know whether parallel universes exist, we know something else about them with certainty: many people instinctively dislike them, and... |
83239719134dbb1a | Sign up ×
Inspired by this question: Are these two quantum systems distinguishable? and discussion therein.
Given an ensemble of states, the randomness of a measurement outcome can be due to classical reasons (classical probability distribution of states in ensemble) and quantum reasons (an individual state can have ... |
7bee13d1f552e88e |
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From what I remember in my undergraduate quantum mechanics class, we treated scattering of non-relativistic particles from a static potential like this:
1. Solve the time-independent Schrodinger equation to find the energy eigens... |
3946752bf6299a06 | Complex number
From Wikipedia, the free encyclopedia
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A complex number can be visually represented as a pair of numbers (a, b) forming a vector on a diagram called an Argand diagram, representing the complex plane. "Re" is the real axis, "Im" is the imaginary axis, and i is the imaginary uni... |
e034e2674209d37f | Classical Fluids via Quantum Mechanics
The subject of this post is probably a bit too technical to interest many readers, but I’ve been meaning to post something about it for a while and seem to have an hour or so to spare this morning so here goes. This is going to be a battle with the clunky WordPress latex widget t... |
d61e55ccbc5de07b | Open Access Nano Express
Origin of the blueshift of photoluminescence in a type-II heterostructure
Masafumi Jo1,2,4*, Mitsuru Sato1, Souta Miyamura1, Hirotaka Sasakura1, Hidekazu Kumano1 and Ikuo Suemune1,3
Author Affiliations
For all author emails, please log on.
Received:4 October 2012
Accepted:14 November... |
86be14817b58dec9 | Mathematical equations aren't just useful — many are quite beautiful. And many scientists admit they are often fond of particular formulas not just for their function, but for their form, and the simple, poetic truths they contain.
While certain famous equations, such as Albert Einstein's E = mc^2, hog most of the pub... |
fce172edad771632 | You are currently browsing the tag archive for the ‘limiting amplitude function’ tag.
Perhaps the most fundamental differential operator on Euclidean space {{\bf R}^d} is the Laplacian
\displaystyle \Delta := \sum_{j=1}^d \frac{\partial^2}{\partial x_j^2}.
The Laplacian is a linear translation-invariant operator, a... |
9598358e24829b70 | Thursday, January 14, 2016
What is Life?
The other day, I came across a paper by Erwin Schrödinger , first published in 1944, titled simply, "What is Life?" I didn't read it and have no intention of reading it. And I highly recommend you not read it either!
According to Wikipedia, Schrödinger is known for his "Schrö... |
87ab0294696e1de2 | Friday, 15 January 2016
Towards Quantum Economics
From Wikipedia, the free encyclopedia/Blogger Ref
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Quantum Economics (a.k.a. quantum macroeconomics, a.k.a. the theory of money emissions) is a school of monetary economic analysis developed by French economist Bernard Schmitt (* 1929 in Col... |
2f4a805b59f20f03 | E K Retail Sundaram Shetty Nagar Behind IIM Bannerghatta Road
E K Retail Supermarket Vijaya Enclave
E k Retail superstore, ( supermart ) is situated Behind IIM Bangalore, in Sundaram Shetty Nagar. Just beside another popular shop Namma Upahara, Vijaya Bank ( 1000 th Branch ), and Three ( 3 ) Kids play schools.[ Podar... |
de68806949bf1a1e | Vote for inflation Nobel Prize
March 20, 2014
3. A combined prize for both
4. A prize just for the theory
5. A prize just for the experiment
6. No prize at all.
How certain are the BICEP2 findings?
March 20, 2014
Has BICEP2 really seen cosmological B-modes?
Were these B-modes formed by p... |
5fc72d6a5df426ba | Overcoming inertia
The tremendous accelerations involved in the kind of spaceflight seen on Star Trek would instantly turn the crew to chunky salsa unless there was some kind of heavy-duty protection. Hence, the inertial damping field.
— Star Trek: The Next Generation Technical Manual, page 24.
For a space opera RPG... |
a80bc0fd0430482b | Download Power of one qumode for quantum computation Please share
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Power of one qumode for quantum computation
The MIT Faculty has made this article openly available. Please share
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Liu, Nana,... |
9dd358a81af933bd | Several New Papers now Online
The end of the year is rapidly approaching, and I’d like to draw your attention to three papers of mine that have been recently published online.
Theoretical Characterization of Conduction-Band Electrons in Photodoped and Aluminum-Doped Zinc Oxide (AZO) Quantum Dots
This first paper was... |
deb0d870ff353aa2 | Treating Markets Mechanically – An Example
April 27, 2011
The aim of this post is to provide the transition from time-independence to time-dependence within a simple economic model for further reference.
For that purpose we consider a single consumer-worker. This agent obeys a time constraint on labour L and free ti... |
576a8b60be0f7b44 | Quantum Approaches to Consciousness
First published Tue Nov 30, 2004; substantive revision Tue Jun 2, 2015
It is widely accepted that consciousness or, more generally, mental activity is in some way correlated to the behavior of the material brain. Since quantum theory is the most fundamental theory of matter that is... |
cfea8367b4181b6c | Sunday, November 04, 2007
Can one assign a continuous Schrödinger time evolution to light-like 3-surfaces?
Alain Connes wrote very interesting comments about factors of various types using as an example Schrödinger equation for various kinds of foliations of space-time to time=constant slices. If this kind of foliati... |
9fd8e3fc3f638658 | NIST Physical Measurement Laboratory Table of contents logo
Atomic Reference Data
for Electronic Structure Calculations
These calculations are all carried out in the framework of generalized Kohn-Sham theory ([5], and Chapter 7 of Ref. [3]). Details of the LDA, LSD, RLDA, and ScRLDA formalisms are described in inde... |
cc9ae40264bb7dac | Viewpoint: Negative Frequencies Get Real
• Fabio Biancalana, Max Planck Institute for the Science of Light, Günther-Scharowsky Strasse 1/26, D-91058 Erlangen, Germany
Physics 5, 68
Figure 1: Schematic representation of a propagating optical soliton that sheds in its wake two distinct blue-shifted modes: the usual po... |
23c49195c473ec20 | alegría, galería, argelia, alergia, riégala, aligera
Leyendo rápidamente las inquietudes y alegrías de la gente en facebook esta mañana, leo en el muro de una amiga: “Dia mundial contra el cancer de mama”
Y yo pienso, “joder, vaya madre más importante la suya, que tiene su propio día mundial; pensaré en ella yo tambi... |
29d6dbb74df35319 | Schrödinger picture
From Wikipedia, the free encyclopedia
Jump to: navigation, search
In physics, the Schrödinger picture (also called the Schrödinger representation[1]) is a formulation of quantum mechanics in which the state vectors evolve in time, but the operators (observables and others) are constant with respec... |
c5451792fabd3adc | We aim to elucidate experiment in nanoscale optics and plasmon-enhanced molecular spectroscopy using first-principles theory and computation. Well-defined descriptions of such phenomena, which involve the simultaneous interaction of molecules, nanoscale plasmon-supporting metals, and the electromagnetic field, are dif... |
b44afe1bf762e43b | Theories of Knowledge and Quantum Mechanics
Michel Bitbol
CREA/CNRS, 1, rue Descartes, 75005 Paris FRANCE
Published in: SATS (Nordic journal of philosophy), 2, 37-61, 2001
Full text in Word/RTF format on Pittsburgh Archive in the Philosophy of science
Quantum Mechanics has imposed strain on traditional (dualist an... |
1fde55ff5a986b44 | Vidar Gudmundsson
Learn More
We present a theoretical study of the unielectronic energy spectra, electron localization, and optical absorption of triangular core-shell quantum rings. We show how these properties depend on geometric details of the triangle, such as side thickness or corners' symmetry. For equilateral t... |
78affc16f0e3ad08 | Difference between revisions of "Complex number"
From Citizendium, the Citizens' Compendium
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m (Historical example: Changed x to y in the quadratic equation encountered; using x for two different quantities at the same time seemed potentially confusing)
Line 25: Line 25:
It follows from the ... |
8f59e8277f6dd843 | Re-visiting the Complementarity Principle: the field versus the flywheel model of the matter-wave
Note: I have published a paper that is very coherent and fully explains what’s going on. There is nothing magical about it these things. Check it out: The Meaning of the Fine-Structure Constant. No ambiguity. No hocus-poc... |
2a4fedb310c8213e | Wolfram Computation Meets Knowledge
The Wolfram Solution for Chemistry
The Wolfram chemistry solution offers a complete suite of tools for analytical, physical, organic, and inorganic chemistry, including high-powered data analysis, interactive visualization and automatic reporting—all in one system.
Curated chemica... |
df746645b1c01034 | Say I have a molecular wavefunction as a set of molecular orbitals and want to calculate the molecule's dipole moment, but don't know how! I searched a lot but couldn't find any practical example.
$$\psi _i=\sum ^N_{i=1}C_i\mathrm e^{-\alpha _ir^2}$$
• 1
$\begingroup$ You could use the variational theorem to de... |
cc0180d3c34e3ba1 | Notes on "A New Kind of Science"
12 July 2002
This page contains my notes from reading Stephen Wolfram's "A New Kind of Science". The notes are generally arranged in the order of the book, with the exception that common themes are brought out in a separate section, and with the proviso that the notes are read hand-in... |
03287e9b6bb8d110 | Creation and annihilation operators
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{{ safesubst:#invoke:Unsubst||$N=Refimprove |date=__DATE__ |$B= {{#invoke:Message box|ambox}} }} Creation and annihilation operators are mathematical operators that have widespread applications in quantum mechanics, notably... |
8932e136a5008b15 | The Chemical Bond Across the Periodic Table: Part 1 – First Row and Simple Metals FernandesGabriel Freire Sanzovo CunhaLeonardo dos Anjos MachadoFrancisco Bolivar Correto FerrãoLuiz 2020 <p>Chemical bond plays a central role in the description of the physicochemical properties of molecules and solids and it is essentia... |
36914ab896487cc3 | Consider the linear Schrödinger equation $i\partial_t u = -\Delta u$, where $\Delta$ is the Laplacian on the hyperbolic space $\mathbb{H}^d$. What are the admissible pairs $(p, q)$ such that we have Strichartz estimates of the form $$ \Vert u\Vert_{L^p_tL^q_x(\mathbb{R}\times\mathbb{H}^d)} \leq C_{p, q}\Vert u_0\Vert_{... |
f5bb32a81c51d454 |
25 thoughts on “Calling all Quantum Theorists and Cosmologists who can be patient with innumerate humanists and theists…
1. Gavin
I can’t play ask-a-physicist without setting some limits, or I won’t have time for anything else in my life. Here are some rules:
1. I don’t discuss theories o... |
f05fc94e91d350a1 | All Issues
Volume 7, 2020
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
20... |
39a292184548be5d | Pilot Wave Theory
There’s one interpretation of the meaning of quantum mechanics that somehow manages to skip a lot of the wildly extravagant, or near mystical ideas of the mainstream interpretations: it’s DeBroglie-Bohm Pilot-Wave theory. Despite it’s alluring intuitive nature, for some reason it remains a fringe the... |
3d51b0b6851966d1 | Svenskt kvinnobiografiskt lexikon
To advanced search
To Karp (External link)
Inga Margrete Fischer-Hjalmars
Chemist, physician
Inga Fischer-Hjalmars was a Swedish chemist and a theoretical physician. She was the first woman to be appointed professor of theoretical physics in Sweden.
Inga Fischer-Hjalmars was ... |
eb244dc14747a2a5 | Bound State
Get Bound State essential facts below. View Videos or join the Bound State discussion. Add Bound State to your PopFlock.com topic list for future reference or share this resource on social media.
Bound State
In quantum physics, a bound state is a quantum state of a particle subject to a potential such that... |
45c35f19a84e5a23 | Gravitational Time-Dilation
Robert A. Herrmann
Revised 26 JAN 2008 and 6 JUN 2012.
In modern physics, "time" is considered as an actual physical primitive. As such its properties are only operationally represented. That is, the properties of (physical or observer) time are relative to its measure and the instrumentat... |
31d94c6b806bbd1d | The true mystery of quantum physics
In many of our papers, we presented the orbital motion of an electron around a nucleus or inside of a more complicated molecular structure[1], as well as the motion of the pointlike charge inside of an electron itself, as a fundamental oscillation. You will say: what is fundamental ... |
4f174f22b5fc0061 | Ground state
Energy levels for an electron in an atom: ground state and excited states. After absorbing energy, an electron may jump from the ground state to a higher-energy excited state.
The ground state of a quantum-mechanical system is its lowest-energy state; the energy of the ground state is known as the zero-... |
59f03af78a9c79ad | Future tension | Aeon
Will the sun rise? Photo taken from the ISS on 1 March 2016. Photo courtesy NASA
Future tension
Facts about the past and present are either true or false. Can knowledge of the future offer the same degree of certainty?
by Anthony Sudbery + BIO
Que sera sera
Whatever will be will be
The futu... |
ff92e4c8066848f3 | How to play mathematics | Aeon
How to play mathematics
by Margaret Wertheim + BIO
What does it mean to know mathematics? Since maths is something we teach using textbooks that demand years of training to decipher, you might think the sine qua non is intelligence – usually ‘higher’ levels of whatever we imagine t... |
66d7b2e39ef26838 | Recent zbMATH articles in MSC 14 2021-11-25T18:46:10.358925Z Werkzeug A singular mathematical promenade 2021-11-25T18:46:10.358925Z "Ghys, Étienne" At the first look, one may feel that the book title is a little bit strange. The word singular in the title refers to the concept of singularity of a curve and does not mea... |
ebf23c54914f3ead | Matter and Energy: A False Dichotomy
Matt Strassler [April 12, 2012]
It is common that, when reading about the universe or about particle physics, one will come across a phrase that somehow refers to “matter and energy”, as though they are opposites, or partners, or two sides of a coin, or the two classes out of whic... |
0b68a693cb9bf1a2 | What is Quantum Entanglement? Part 1: Waves and particles
If you follow science, or science fiction, to any degree, great or small, you’ve probably heard the term “quantum entanglement” before. You may also have heard it referred to as “spooky action at a distance,” and understand that it somehow involves a weird con... |
9ddeda4ce1aa4e0f | Einstein and the speed limit of the universe
Einstein did not support the fundamental uncertainty of quantum physics. He stubbornly maintained the idea that reality was permanent and objective and that the observer played not a significant role. Yet the observer plays quite an important role in his best-known work, th... |
937f5f41f4498dc8 | Tag Archives: relativity
Imaginary Angles
You would have heard about imaginary numbers and most famous of them is i=\sqrt{-1}. I personally don’t like this name because all of mathematics is man/woman made, hence all mathematical objects are imaginary (there is no perfect circle in nature…) and lack physical meaning... |
21401160fdd13321 |
Thursday, July 1, 2021
Whitehead's Process Speculation about Multiverses before there was Speculation
Whitehead's Process Speculation about
Multiverses before there was Speculation
I just recently put together Over the last several days a couple articles on EM/QED and then saw Paul's... |
47546e55bcea379e | @article{31112, abstract = {{AbstractCoordinative challenging exercises in changing environments referred to as open-skill exercises seem to be beneficial on cognitive function. Although electroencephalographic research allows to investigate changes in cortical processing during movement, information about cortical dyn... |
7cf04f3be8e3c2cc | August 1995
Perturbation Theory around Non–Nested Fermi Surfaces
I. Keeping the Fermi Surface Fixed
Joel Feldman, Manfred Salmhofer, Eugene Trubowitz
Mathematics Department, University of British Columbia, Vancouver, Canada V6T 1Z2
Mathematik, ETH–Zentrum, CH–8092 Zürich, Switzerland
This paper is dedicated to th... |
3eba29da16d5561f | Quantum Chemistry
Malte Döntgen
Group Leader Computational Chemistry
+49 241 80 26907
Molecule with Orbital Copyright: © 2020, American Chemical Society A molecular orbital of dimethoxy methane. Reprinted with permission from https://doi.org/10.1021/acs.jcim.0c00787.
Quantum chemical calculations are based o... |
cafca1e2ef5b5813 | Take the 2-minute tour ×
At school I really struggled to understand the concept of imaginary numbers. My teacher told us that an imaginary number is a number which has something to do with the square root of -1. When I tried to calculate the square root of -1 on my calculator, it gave me an error. To this day I do not... |
98526b1dee8bbf52 | berfrois » Science Intellectual Jousting in the Republic of Letters Thu, 28 Aug 2014 20:22:51 +0000 en-US hourly 1 Many, Many, Many, Many Worlds Mon, 07 Jul 2014 08:01:49 +0000 936full-sliders-screenshot
From Sliders, NBCUniversal
by Sean Carroll
I have often talked about the Many-Worlds or Everett approach to quantu... |
049c5458e6b0b19b | Take the 2-minute tour ×
Disclaimer: I am not a physicist; I am a geometer (and a student!) trying to learn some physics. Please be gentle. Thanks!
When solving the Schrödinger equation for a particle in a spherical potential, it seems common to separate variables into angular and radial components. The angular evolu... |
9c9d486a0fdd9b8e | From Wikipedia, the free encyclopedia
Jump to: navigation, search
The monomer repeat unit of unsubstituted polythiophene.
Polythiophenes demonstrate interesting optical properties resulting from their conjugated backbone, as demonstrated by the fluorescence of a substituted polythiophene solution under UV irradiation.
... |
3e4eb7249acc8aee | Take the 2-minute tour ×
What does superposition mean in quantum mechanics?
When I say $A+B=C$ (forces). I can mean push something with force $A$ + force $B$ together, and that is same as I push it with force $C$.
But when I say wavefunction $A$ + $B$ is also a solution of Schrodinger equation, what do I mean? The p... |
5b4e2ceebfc56130 | Acceleration Signals From Superconductors
The Multifamily Structure of Matter
Supersymmetry with a Triplet Higgs
Status of Experiments: 03 December, 2013
Speculative Source of the Wave Function Ψ
By David Schroeder
Time delay ckt. added to mother board.
Newly built scope trigger ckt.
Earlier cryostat configurati... |
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... |
c02a9bcf9ac8d5ca | From Wikipedia, the free encyclopedia
Jump to: navigation, search
This solution of the vibrating drum problem is, at any point in time, an eigenfunction of the Laplace operator on a disk.
In mathematics, an eigenfunction of a linear operator, A, defined on some function space, is any non-zero function f in that space ... |
087e0a6373463be4 | Jan 03
Physics for Kids: 49 Easy Experiments With Heat (PHYSICS FOR
Format: Hardcover
Language: English
Format: PDF / Kindle / ePub
Size: 9.32 MB
Downloadable formats: PDF
Pages: 150
Publisher: Tab Books; 1st edition (May 1990)
ISBN: 0830692924
Light is affected by gravitational forces pdf. Students indicate... |
ed9ce05803ed554e | Saturday, May 29, 2010
This weekend, I'll be on my way back to Sweden. My time here at Perimeter Institute turned out to be busier than expected, but it has also been very productive. It is somewhat sad that every time I come back more people I knew have left. Those postdocs who I spent my years with here have either... |
5f3641b3ce186fdc | Archive for February, 2009
Physics Friday 61
February 27, 2009
Let us consider a spinning “top”, spinning about an axis of rotational symmetry with angular velocity ω; the mass of the top is m, and the moment of inertia for the top about this axis is I. The top is supported by a surface below, which it contacts at a... |
4f2537bebc031366 | Equation of the Day #14: The Harmonic Oscillator
The career of a young theoretical physicist consists of treating the harmonic oscillator in ever-increasing levels of abstraction.”
Sidney Coleman
One of the first physical systems students get to play with is the harmonic oscillator. An oscillator is a system with som... |
07d197632c814b82 | Throwing balls on torus-earth
A question came up on Physics Stack Exchange: how does thrown object trajectories look on a toroidal planet?
Locally we should expect them to be like on Earth: there is constant gravitational acceleration orthogonal to the ground, so they will just look like parabolas.
But if the trajec... |
c6ebc088df0a699a | Principal quantum number
From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
In quantum mechanics, the principal quantum number (symbolized n) is one of four quantum numbers which are assigned to all electrons in an atom to describe that electron's state. As a discrete variable, the principal quan... |
77110d37e4200f2f | Some Shortcomings of Science
Repost from Sabine Hossenfelder’s blog “Backreaction”
Two posts this week. The first is more for scientists, but I think it mentions points that people reading about science should recognise as possibly there. Sabine has been somewhat critical of some of modern science, and I feel... |
31f70718597a4530 | Light and Molecules
Mario Barbatti's Research Group
Methods for nonadiabatic dynamics
Nonadiabatic dynamics
When a molecule absorbs a photon in the UV or visible range, the energy goes to its electrons, whose configuration is changed in comparison to the ground state electronic density. The probability of absorbing... |
7df3f82ae3f95d71 | Posts Tagged ‘causation’
Materia Prima
10 December 2012
The Beginning of the End
So this is it for me and Bernard d’Espagnat’s On Physics and Philosophy.
In the final chapter d’Espagnat allows himself to speculate on the philosophical and spiritual importance of his veiled reality (which he capitalizes) in particu... |
9efde7a1f3d8f38e |
Time crystals would be a perpetuum mobile
One of the widely shared recent articles at was
Time crystals—how scientists created a new state of matter
What's going on?
Already at this point, you may see a misconception that leads to Wilczek's impossible proposals. There's a very general implicit problem in his u... |
d0d9a9e8447a5c69 | ParSol is a library for semi-automatic parallelisation of data-parallel (especially linear algebra) algorithms. It is written in C++, using such C++ features as OOP, template metaprogramming, operatror overloading and others, so that the usage of the library is simple and intuitive, and the library itself is easily exp... |
9b9bed3bfadfa8d7 | After months of speculation, rumours and a leaked paper, the American Institute of Aeronautics and Astronautics (AIAA) has finally published a peer-reviewed paper by Nasa Eagleworks researchers on the controversial space propulsion technology EmDrive which shows that the device does indeed work.
The open access paper,... |
4a16c667bdc492ce | Tuesday, November 28, 2006
Chemistry (from Greek χημεία khemeia[1] meaning "alchemy") is the science of matter at the atomic to molecular scale, dealing primarily with collections of atoms, such as molecules, crystals, and metals. Chemistry deals with the composition and statistical properties of such structures, as ... |
7dd297343f393378 | Friday, October 28, 2005
Science today, gone tomorrow
Christopher Ireland asked me a wonderful question a few days ago: “Of all the facts and principles that science currently believes to be true, which do you think are most likely to be disproved in the next 50-100 years?”
There is more up for grabs in the sciences... |
e1c540c06476330b | tisdag 15 november 2016
realQM vs Hartree-Fock and DFT
I have put up an updated version of realQM (real Quantum Mechanics) to be compared with stdQM (standard QM).
stdQM is based on a linear Schrödinger equation in a $3N$ dimensional wave function with global support for an atom with $N$ electrons, which is made com... |
3e4e2bd8dc2dd61c | [#10] The Nature of Reality: Matter, Experience, Appearance, Presence
A few days ago I gave a short talk, followed by a much longer discussion, in the Consciousness Club series at YHouse. The topic was the nature of reality, with the full title "Matter, Experience, and Reality". Actually, I wound up talking about... |
f54af13613cc0c4e | Credit portal
How to take derivative of ln
how to take derivative of ln
Notes on Statistical Thermodynamics - Partition Functions
Many times we divide the study of physical chemistry into two broad classes of phenomena. There is the "macroscopic world," where we study the bulk properties of matter. That is, we s... |
f8b2982f0ab85187 | This article is about the physical quantity: for other uses of the word "energy", see Energy (disambiguation).*
Enlarge picture
Lightning is the electric breakdown of air by strong electric fields, producing a plasma, which causes an energy transfer from the electric field to heat, mechanical energy (the random motion ... |
e845df54d93468fa | Quantum Field Theory/Introduction to The Standard Model
Local gauge symmetry. Gauge theories. Non-Abelian gauge theories.Edit
Spontaneous symmetry breaking. Goldstone theorem. Higgs mechanism.Edit
The Higgs mechanism is a theoretical framework which concerns the origin mass of elementary particles; technically it yi... |
fb8d1a51116e8f96 | Common Compounds
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Electrons in atoms
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Section 13.6: Angular Solutions of the Schrödinger Equation
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Most potential energy functions in three dimensions are not often rectangular in form. In fact, they are most often in spherical co... |
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I've read that QM operates in a Hilbert space (where the state functions live). I don't know if its meaningful to ask such a question, what are the answers to an analogous questions on GR and Newtonian gravity?
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1713c608dae02c2e | Optical Conformal Mapping
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Science 23 Jun 2006:
Vol. 312, Issue 5781, pp. 1777-1780
DOI: 10.1126/science.1126493
According to Fermat's principle (1), light rays take the shortest optical paths in dielectric media, where the refractive index n integrated along the ray trajectory... |
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Chemistry LibreTexts
10.1: The Born-Oppenheimer Approximation
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• The Born-Oppenheimer approximation is one of the basic concepts underlying the description of the quantum states of molecules. This approximation makes it possible to separate the motion of the nuclei and the motion of ... |
f20d6ad216db70e5 | Posts Tagged ‘ontology’
Materia Prima
10 December 2012
The Beginning of the End
So this is it for me and Bernard d’Espagnat’s On Physics and Philosophy.
In the final chapter d’Espagnat allows himself to speculate on the philosophical and spiritual importance of his veiled reality (which he capitalizes) in particul... |
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62a4425c5fd98b50 | Published online 2 April 2009 | Nature | doi:10.1038/news.2009.212
Column: Muse
Physics by numbers
A suggestion that the discovery of physical laws can be automated raises questions about what it means to do science, says Philip Ball.
Two decades ago, computer scientist Kemal Ebcioğlu at IBM described a computer pr... |
61084b1d39567b14 | Interpreting the Quantum World I: Measurement & Non-Locality
In previous posts Aron introduced us to the strange, yet compelling world of quantum mechanics and its radical departures from our everyday experience. We saw that the classical world we grew up with, where matter is composed of solid particles governed by s... |
94af8b4a6a7bc8ad | Machine Learning for Quantum Many-body Physics
Excited eigenstates and swarm intelligence algorithms
Bagrov, Andrey
Accessing excited states of a many-body quantum Hamiltonian can be a challenging task, even more complicated than obtaining its ground state. The recently suggested RBM variational ansatz for many-bod... |
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