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f8c6f1277535302a | The Life of Psi
Philosophical Musings on the Foundations of Physics and Chemistry
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Schrödinger's Cat and the Measurement Problem
Quantum mechanics is weird. Very weird. According to quantum theory, particles can be at two positions at the same time. Other particles tend to behave like waves, whereas waves... |
b32b0fb96b8b8b22 | Psychology Wiki
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3e392d8996b5f42f | The term “from months to days” is a favorite slogan of mine and I have relied on it religiously for over two decades to illustrate the fundamental benefit of symbolic computation. Whether it’s the efficient development of complex physical models using MapleSim, or exploration of parametric design surface equations (my ... |
3d79c5ffe8228efd | “Whoa! It's like Spotify but for academic articles.”
Instant Access to Thousands of Journals for just $40/month
Regge trajectories from the two-body, bound-state Thompson equation using a quark-confining interaction in momentum space
Solutions of two-body, bound-state equations have recently been developed for quark... |
57491598a3659b8e | Geometric phase
From Wikipedia, the free encyclopedia
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In classical and quantum mechanics, the geometric phase, Pancharatnam–Berry phase (named after S. Pancharatnam and Sir Michael Berry), Pancharatnam phase or most commonly Berry phase, is a phase difference acquired over the course of a ... |
1b72d856e048a2c2 | From Wikipedia, the free encyclopedia
Jump to: navigation, search
For a mathematical treatment of spin-½, see Spinor.
In quantum mechanics, spin is an intrinsic property of all elementary particles. Fermions, the particles that constitute ordinary matter, have half-integer spin. All known elementary fermions have a sp... |
a02c76db9c589934 | Quantum Computing
First published Sun Dec 3, 2006; substantive revision Tue Jun 16, 2015
Combining physics, mathematics and computer science, quantum computing has developed in the past two decades from a visionary idea to one of the most fascinating areas of quantum mechanics. The recent excitement in this lively an... |
851e6e6338a75057 |
Stanford Encyclopedia of Philosophy
The Many-Worlds Interpretation of Quantum Mechanics
1. Introduction
The fundamental idea of the MWI, going back to Everett 1957, is that there are myriads of worlds in the Universe in addition to the world we are aware of. In particular, every time a quantum experiment with di... |
d66c2897022ea69c | Quantum quartic oscillators with two coupled degrees of freedom
The numerical integration of the non-stationary two-dimensional Schrödinger equation is carried out. The dynamical properties (dynamical averages, frequency spectra, uncertainty relations, autocorrelators) for two quantum oscillators coupled by the Palle... |
93b9b75193551d3a | God Is Not Dead
By Amit Goswami, Ph.D.
Apart from simplistic and very diverse pictures of God that all religions give for popular appeal, at the esoteric core, all religions agree that apart from material interactions, there is another agent of causation in the world; and this is what they call God. Religions also ag... |
ff5f6db8db1f3dce | Monday, July 29, 2019
Now, the package has our return address on it, so you would think that in a situation like that Fedex would simply return the package to us. But you would be wrong. Very, very wrong.
Fedex has an on-line tracking system, so we knew that the package had not been delivered (though at the time ... |
1b7c0713dbe7dc45 | Webrelaunch 2020
Splitting Methods (Winter Semester 2016/17)
Lecture: Tuesday 15:45-17:15 SR 3.61
Problem class: Thursday 15:45-17:15 SR 2.67
Lecturer JProf. Dr. Katharina Schratz
Office hours: By Appointment
Room Kollegiengebäude Mathematik (20.30)
Problem classes Dr. Patrick Krämer
Office hours: by appointment
Room... |
33119d3d34a8a9fe | In the multi-configurational time-dependent Hartree (MCTDH) method, the equation of motion is derived from the time-dependent Schrödinger equation by substituting the wavefunction ansatz expanded in a single particle function (SPF) basis. The wavepacket dynamics is solved by solving a series of decoupled equations of m... |
035f212e2b9458ad | Gleason's theorem
Gleason's theorem In mathematical physics, Gleason's theorem shows that the rule one uses to calculate probabilities in quantum physics, the Born rule, can be derived from the usual mathematical representation of measurements in quantum physics together with the assumption of non-contextuality. Andre... |
e503c81a1fff7d6c | Waves, Kakeya sets, and Diophantine equations
MSRI - June 2017
Waves, Kakeya sets, and Diophantine equations Thumbnail Image
Ciprian Demeter
A central problem in Physics is to understand the complicated ways in which waves can interact with one another. The field of Harmonic Analysis grew out of the observation that... |
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Creators/Authors contains: "Bondy, Aaron"
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1. Abstract Ionization of laser-dressed atomic helium is investigated with focus on photoelectron angular distributions stemming from two-color multi-photon excited states. The experiment combines extreme... |
1fa51f36ea380063 | Arrow of time
From Wikipedia, the free encyclopedia
This article is an overview of the subject. For a more technical discussion and for information related to current research, see Entropy (arrow of time).
Arthur Stanley Eddington
The Arrow of Time, or Time's Arrow, is a concept developed in 1927 by the British astro... |
0570cc0fb87553f2 | Chapter 9: Fundamental Physics
Section 16: Quantum Phenomena
History [of quantum theory]
In classical physics quantities like energy were always assumed to correspond to continuous variables. But in 1900 Max Planck noticed that fits to the measured spectrum of electromagnetic radiation produced by hot objects could ... |
21a6004caeec4648 | Symmetry, Integrability and Geometry: Methods and Applications (SIGMA)
SIGMA 13 (2017), 053, 14 pages arXiv:1704.00043
Contribution to the Special Issue on Symmetries and Integrability of Difference Equations
Symmetries of the Hirota Difference Equation
Andrei K. Pogrebkov ab
a) Steklov Mathematical Institute o... |
6c8861475e6f4114 | Next Contents Previous
In our discussion of manifolds, it became clear that there were various notions we could talk about as soon as the manifold was defined; we could define functions, take their derivatives, consider parameterized paths, set up tensors, and so on. Other concepts, such as the volume of a region or ... |
67b8620c1f2761c4 | Take the 2-minute tour ×
Until recently, I thought that graph theory is a topic which is well-suited for math olympiads, but which is a very small field of current mathematical research with not so many connections to "deeper" areas of mathematics.
But then I stumbled over Bela Bollobas "Modern Graph Theory" in which... |
3a8c4200beb34d39 | Take the 2-minute tour ×
I'm reading the Wikipedia page for the Dirac equation:
$J = -\frac{i\hbar}{2m}(\phi^*\nabla\phi - \phi\nabla\phi^*)$
with the conservation of probability current and density following from the Schrödinger equation:
$\nabla\cdot J + \frac{\partial\rho}{\partial t} = 0.$
The fact that the ... |
1741dab44cfe47e1 | Take the 2-minute tour ×
I have a question regarding the proof of the time-independent Schrödinger equation. So if we have a time-Independent Hamiltonian, we can solve the Schrödinger equation by adopting separation of variables method: we write our general solution as $ \psi(r,t) = \psi(r)*f(t)$ and we get to the two... |
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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}{\par... |
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I would like to know what quantization is, I mean I would like to have some elementary examples, some soft nontechnical definition, some explanation about what do mathematicians quantize?, can we quantize a function?, a set?, a theo... |
950975e0b0590a5a | Take the 2-minute tour ×
I'm reading the Wikipedia page for the Dirac equation:
The Dirac equation is superficially similar to the Schrödinger equation for a free massive particle:
A) $-\frac{\hbar^2}{2m}\nabla^2\phi = i\hbar\frac{\partial}{\partial t}\phi.$
The left side represents the square of the momentum opera... |
4582aa9e0d363398 | The Computational chemistry reference article from the English Wikipedia on 24-Jul-2004
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Computational chemistry
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Computational chemistry is the branch of theoretical chemistry whose major goals are to create efficient computer pro... |
c2dfe2d1baa19254 | Scientific Explanation
First published Fri May 9, 2003; substantive revision Wed Sep 24, 2014
Issues concerning scientific explanation have been a focus of philosophical attention from Pre-Socratic times through the modern period. However, recent discussion really begins with the development of the Deductive-Nomologi... |
63fdf135ebd7b7ba | Take the 2-minute tour ×
Suppose I have only real number problems, where I need to find solutions. By what means could knowledge about complex numbers be useful?
Of course, the obviously applications are:
• contour integration
• understand radius of convergence of power series
• algebra with $\exp(ix)$ instead... |
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1. Apr 28, 2007 #1
Why does in QM the electron does not fall toward the nucleus? After all, the only force between nucleus and electron is attractive (- electron and + nucleus). Is the same reason that justifies the moon does not fall to the earth?
2. j... |
3a0a9d35e38fb3c4 | add contact to address book
Eitan Geva
Office Location(s): 2000D
Phone: 734.763.8012
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• About
Modern computational chemistry strives to provide an atomistically detailed dynamical description of fundamental chemical processes. The strategy for reaching this goal generally follows a two-step pro... |
fb564fb731c38ec3 | Take the 2-minute tour ×
Is there a mechanistic-type explanation for how forces work? For example, two electrons repel each other. How does that happen? Other than saying that there are force fields that exert forces, how does the electromagnetic force accomplish its effects. What is the interface/link/connection betw... |
9ad7cc9bc314d7c4 | Take the 2-minute tour ×
Why is a proton assumed to be always at the center while applying the Schrödinger equation? Isn't it a quantum particle?
share|improve this question
Self interactions are not considered in a non-relativistic quantum mechanical treatment and the Hydrogen atom is usually treated that way, in a ... |
b5659ff8fd89aa69 | My caricature
Ark's Homepage
Curriculum Vitae
What's New
Physics and the Mysterious
Event Enhanced Quantum Physics (EEQT)
Quantum Future
My Kaluza-Klein pages
Links to my other online papers dealing with hyperdimensional physics
QFG Site Map
EEQT, Quantum Jumps and Quantum Fractals
Paper "Quantum Jumps, E... |
c483da7f07fbd403 | Green's function
From Wikipedia, the free encyclopedia
Jump to: navigation, search
This article is about the classical approach to Green's functions. For a modern discussion, see fundamental solution.
In mathematics, a Green's function is the impulse response of an inhomogeneous differential equation defined on a dom... |
9a130d43a0fabb96 | DSSP: Deep Space Scouting Party
"More you know, more the universe shrinks"
Select another topic from the gold post
HyperFlight home Portal in new window
DSSP topics deal with gravitation, free energy, light, and atomic tractability
2012 Topics for the month of:
December: Neutrino is not .. (Concluding with Part ... |
66ce42b54910dfa2 | Collective excitations of dipolar gases basedon local tunneling in superlattices
Collective excitations of dipolar gases based
on local tunneling in superlattices
Lushuai Cao Ministry of Education Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Tec... |
aff93a2ecb7d196a | Correlation between Diffusion Equation and Schrödinger Equation
Journal of Modern Physics
Vol.4 No.5(2013), Article ID:31602,4 pages DOI:10.4236/jmp.2013.45088
Correlation between Diffusion Equation and Schrödinger Equation
Takahisa Okino
Department of Applied Mathematics, Faculty of Engineering, Oita University, ... |
43cd521a8d65a53d | World Library
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Mathematical analysis
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Subject: Mathematical constant, Real analysis, Pure mathematics, Glossary of topology, List of important p... |
2c0a653105b86004 | March 20, 2006
Computational Chemistry advance: 100 times more accurate
James Sims of NIST and Stanley Hagstrom of IU announced a new high-precision calculation of the energy required to pull apart the two atoms in a hydrogen molecule (H2). Accurate to 1 part in 100 billion, these are the most accurate energy values ... |
9eb8980be5090b04 | Pseudo-spectral method
From Wikipedia, the free encyclopedia
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Pseudo-spectral methods,[1] also known as discrete variable representation (DVR) methods, are a class of numerical methods used in applied mathematics and scientific computing for the solution of partial differential equations. T... |
9ed0a8f84c03fae1 | Take the 2-minute tour ×
In order to calculate the cross-section of an interaction process the following formula is often used for first approximations:
$$ \sigma = \frac {2\pi} {\hbar\,v_i} \left| M_{fi}\right|^2\varrho\left(E_f\right)\,V $$ $$ M_{fi} = \langle\psi_f|H_{int}|\psi_i\rangle $$
Very often plane waves ... |
0361b44525afb061 | Take the 2-minute tour ×
I read in several papers that for a Harmonic Oscillator Hamiltonian in the time dependent Schrödinger equation a Gaussian wave packet remains Gaussian.
Unfortunately I could not find any proof for this statement and trying to verify it myself I did not succeed. If I make a general ansatz with... |
2350310614295384 | Please pay $5 ($9 for international requests), the fee for access to this archived article, to by
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Making up the Mind
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The New York Review ... |
ff6929fad1b957e8 | God Is Not Dead
God Is Not Dead
By Amit Goswami, Ph.D.
Apart from simplistic and very diverse pictures of God that all religions give for popular appeal, at the esoteric core, all religions agree that apart from material interactions, there is another agent of causation in the world; and this is what they call God. ... |
90ba7be0c57adb2d | Take the 2-minute tour ×
I am trying to understand how complex numbers made their way into QM. Can we have a theory of the same physics without complex numbers? If so, is the theory using complex numbers easier?
share|improve this question
Complex numbers are fundamental and natural and QM can't work without them - o... |
86731e62d0c2fc3c | next up previous
Next: THE BOLTZMANN COLLISION Up: Boundary Conditions for Open Previous: BOUNDARY CONDITIONS FOR
In the semiconductor structures which originally motivated this work the charge carriers whose motion we seek to describe are really quasiparticles whose properties are determined by the energy band stru... |
0a07a7d32841e54a | Anderson localization
From Wikipedia, the free encyclopedia
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In condensed matter physics, Anderson localization, also known as strong localization, is the absence of diffusion of waves in a disordered medium. This phenomenon is named after the American physicist P. W. Anderson, who was the ... |
6b2becd25d49d817 | Physics & Math
Home |Physics & Math | News
Molecules from scratch without the fiendish physics
A SUITE of artificial intelligence algorithms may become the ultimate chemistry set. Software can now quickly predict a property of molecules from their theoretical structure. Similar advances should allow chemists to desi... |
572a3bcc7b972fd2 | 1 Digital Solution of the Mind-Body Problem Ralph Abraham, Sisir Roy <abraham@vismath.org> (Department of Mathematics, Santa Cruz, U.S.A.)
Using the concepts of the mathematical theory of self-organizing systems in understanding the emergence of space-time at Planck scale, we proposed a digital solution of the mi... |
b249ac2ab1b428f9 | « · »
Section 7.9: Exploring Eigenvalue Equations
check to force initial vector to be of unit size
check to see paths of vectors (only for unit vectors)
Please wait for the animation to completely load.
The time-independent Schrödinger equation is an energy-eigenvalue equation. What does this mean? Symbolicall... |
63c1567ba68b86ee | The Many Interpretations of Quantum Mechanics
What is the ultimate nature of reality?
Are quantum effects constantly carving us into innumerable copies, each copy inhabiting a different version of the universe? Or do all those other worlds pop out of existence as mere might-have-beens? Do our particles surf on quant... |
36a8a6ae06c0a2f7 | « · »
Section 1.6: Exploring the Input of Data: Complex Expressions
real part of the function =
imaginary part of the function =
Please wait for the animation to completely load.
Complex functions are absolutely necessary to describe quantum-mechanical phenomena. Quantum-mechanical time evolution is governed by t... |
73144e3b468c6b1f | Wave Function From Sixty Symbols Channel (Extra Footage)
A wave function or wavefunction is a probability amplitude in quantum mechanics describing how a particle or a system of particles behaves in a given quantum state. The probability amplitude is distributed as a waveform through space and time, the unifying conce... |
37b7c0da1df21f73 | Quantum Physics
Wave Function for Classical Mechanics
Authors: Janne Mikael Karimäki
In this paper the relationship of classical physics and quantum physics is studied by introducing a partial differential equation, which describes classical mechanics, but looks very similar to the Schrödinger wave equation of quan... |
e8cdaeee5b8c6cfc | Collaborative Refutation
At least eight people—journalists, colleagues, blog readers—have now asked my opinion of a recent paper by Ross Anderson and Robert Brady, entitled “Why quantum computing is hard and quantum cryptography is not provably secure.” Where to begin?
1. Based on a “soliton” model—which seems to ... |
43ac9033ed4fd297 | Take the 2-minute tour ×
I am trying to solve a Schrödinger equation for a particle hitting a step potential using NDSolve in Mathematica. Here is my code:
mu = 6.;
m = mu;
R = 5.;
Vs2 = 4./(2*m*R^2);
Vs = -10./(2*m*R^2) + Vs2;
Energy = 0.001
VCC[r_] = Vs*UnitStep[R - r] + Vs2*UnitStep[r - R];
L = 0;
system = {RC''... |
bb13e9a8de0ae5b9 | Infrared Spectroscopy
- mirrored from UCLA -
Adapted from : R. L. Pecsok L. D. Shields, Modern Methods of Chemical Analysis (Wiley, New York, 1968); and A.T. Schwartz et al., Chemistry in Context (American Chemical Society, Washington, DC 1994).
A portion of the electromagnetic spectrum is shown in Figure 1, along... |
b06fa1903052541e | Take the 2-minute tour ×
First, let me state that I'm a lot less experienced with physics than most people here. Quantum mechanics was as far as I got and that was about 9 years ago, with no use in the meantime.
A lot of people seem to think that the act of observing the universe we are changing the universe. This is... |
76c8b3e188c64d95 | Short strong hydrogen bonds studied by inelastic neutron scattering and computational methods
Date of Award
Degree Type
Degree Name
Doctor of Philosophy (PhD)
Bruce S. Hudson
Hydrogen bonds, Neutron scattering, Bond energies, Potassium hydrogen bistrifluoroacetate
Subject Categories
Chemistry | Physical S... |
0cc8e3e6f50b6241 | Register Log in
Scientific Method / Science & Exploration
Happy 100th birthday to the Bohr atom
Bohr's simple model led to quantum mechanics and beyond.
Danish physicist Niels Bohr, whose model of atoms helped explain the spectrum of light emitted and absorbed by different elements, as illustrated by the spectrum e... |
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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... |
8ac7e59b3fe35d94 | Fundamental Research Funding
Michael Nielsen, who’s so smart it’s like he’s posting from tomorrow, offers a couple of provocative questions about the perception of a crisis in funding for basic science:
First, how much funding is enough for fundamental research? What criterion should be used to decide how much money ... |
3df3fd097d84840b | Take the 2-minute tour ×
In 1 dimension what is the solution of the Schrödinger equation with potential
$$ V(x) = V_r + i V_i $$
Potentials are constant.
share|improve this question
1 Answer 1
The Hamiltonian $$H=T_{\text{kin}}+V_r+iV_i$$ will not be Hermitian as $$(iV_i)^*=-iV_i.$$
Technically, you can make an ... |
9fa2fb5ffc9525b5 | Take the 2-minute tour ×
I am reading a book on quantum field theory, while I have never been trained as a physicist. I found a big gap in language and have trouble understanding what physicists mean by "quantum field".
If I understand correctly, after quantizing twice (field and operator). quantum field should be an... |
d57296b38cb83afe | The Nature of Things
Presidential Address
given to the British Society for the Philosophy of Science
J.R. Lucas
on June 7th, 1993
I stand before you a failed materialist. Like Lucretius, from whom I have borrowed my title, I should have liked to be able to explain the nature of things in terms of ultimate thing-... |
50b4fcfac43166dc | De Donder–weyl Theory and a Hypercomplex Extension of Quantum Mechanics to Field Theory
Igor V. Kanatchikov
Laboratory of Analytical Mechanics and Field Theory
Institute of Fundamental Technological Research
Polish Academy of Sciences
Świȩtokrzyska 21, Warszawa PL-00-049, Poland
e-mail: ,
(Submitted May 1998 —— Accept... |
546ccc5ac45e93f8 | @article{9005, abstract = {Studies on the experimental realization of two-dimensional anyons in terms of quasiparticles have been restricted, so far, to only anyons on the plane. It is known, however, that the geometry and topology of space can have significant effects on quantum statistics for particles moving on it. ... |
d59c80ff00eff2e2 | Quantum Mechanics: The Death of Local Realism
From Pantheism to Monotheism
Charlie had covered a lot of ground by this point. He’d started in the age of mythology, at the dawn of civilization, looking at the cultural and socio-political forces that underpinned and supported the local mythology and priesthood classes... |
796f8be24d0ea523 | Delayed-choice quantum eraser
Last updated
The delayed-choice quantum eraser experiment investigates a paradox. If a photon manifests itself as though it had come by a single path to the detector, then "common sense" (which Wheeler and others challenge) says that it must have entered the double-slit device as a par... |
0224d3b3c4b7c69b | Coronavirus (Covid-19): Latest updates and information
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Theory of Electron, Phonon and Spin Transport in Nanoscale Quantum Devices
Hatef Sadeghi
At the level of fundamental science, it was recently demonstrated that molecular wires can mediate long-range phase-coherent tunnell... |
de99b907bc0ac955 | Forty years as an AFOSR PI: Rod Bartlett’s Personal History
Written By Rod Bartlett
When most read a popular account of scientific progress, the focus is on the ‘big name’ projects that one knows from the press: solar energy storage, hydrogen fuel, reduction of greenhouse gases, cures for cancer, etc. And the ‘exper... |
ce5ecfce3ab4504f | Artificial Intelligence Solves Schrödinger’s Equation, a Fundamental Problem in Quantum Chemistry – SciTechDaily
Quantum Physics Concept
Scientists at Freie Universität Berlin develop a deep learning method to solve a fundamental problem in quantum chemistry.
Up to now, it has been impossible to find an exact solu... |
6e51a3b543cb7e3f | hamiltonian operator for hydrogen atom
{\displaystyle \psi _{n\ell m}} π R In 1913, Niels Bohr obtained the energy levels and spectral frequencies of the hydrogen atom after making a number of simple assumptions in order to correct the failed classical model. {\displaystyle \Phi (\phi )} and takes the form. B • The Ha... |
a0c3d0b66ae96047 | Canonical Commutation Relation
Get Canonical Commutation Relation essential facts below. View Videos or join the Canonical Commutation Relation discussion. Add Canonical Commutation Relation to your PopFlock.com topic list for future reference or share this resource on social media.
Canonical Commutation Relation
In q... |
8fc5e28f94a0b67a | The end of “Love”? #cirquedusoleil #beatles
It was sad to hear the news today that one of the victims of the Covid-19 virus is Cirque Du Soleil as they declared bankruptcy and laid off thousands of workers. All of their shows have ceased operations due to the virus and the company incurred massive amounts of debt. Hop... |
19479de68125b0bc | LOG#070. Natural Units.
Happy New Year 2013 to everyone and everywhere!
Let me apologize, first of all, by my absence… I have been busy, trying to find my path and way in my field, and I am busy yet, but finally I could not resist without a new blog boost… After all, you should know the fact I have enough materials ... |
1cc94255dca77c5a | Quantum Mechanics/Time Independent Schrödinger
Consider a particle confined to a one-dimensional box with impenetrable walls. When you solve the Schrödinger equation for the wavefunctions you get two sets of solutions: those of positive parity, and those of negative parity:
\Psi_{P=1} = A \cos \left[\frac... |
2f1fd010ee570618 | Complex number
From Wikipedia, the free encyclopedia
(Redirected from Complex numbers)
Jump to: navigation, search
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 imagin... |
348fd81738d97eaf | Computational chemistry
From Wikipedia, the free encyclopedia
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Computational chemistry is a branch of chemistry that uses principles of computer science to assist in solving chemical problems. It uses the results of theoretical chemistry, incorporated into efficient computer programs, to ca... |
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Coming from a mathematical background, I'm trying to get a handle on the path integral formulation of quantum mechanics.
According to Feynman, if you want to figure out the probability amplitude for a particle moving from one point... |
746aaea4d17dd411 | Original Paper
Journal of Mathematical Chemistry
, Volume 51, Issue 1, pp 297-315
First online:
Entropic representation in the theory of molecular electronic structure
• Roman F. NalewajskiAffiliated withDepartment of Theoretical Chemistry, Jagiellonian University Email author
The entropic perspective on the... |
4a2df77d63787786 | Take the 2-minute tour ×
Back in college I remember coming across a few books in the physics library by Mendel Sachs. Examples are:
General Relativity and Matter
Quantum Mechanics and Gravity
Quantum Mechanics from General Relativity
Here is something on the arXiv involving some of his work.
In these books (which... |
4d967adfa1477799 | Viewpoint: Crystals of Time
• Jakub Zakrzewski, Marian Smoluchowski Institute of Physics, Jagiellonian University, 30-059 Krakow, Poland
Physics 5, 116
Researchers propose how to realize time crystals, structures whose lowest-energy states are periodic both in time and space.
T. Li et al., Phys. Rev. Lett. (2012)
Fi... |
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... |
c4c8c6b43ef6d096 | Chandrasekhar limit
From Wikipedia, the free encyclopedia
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The Chandrasekhar limit (/ʌndrəˈʃkər/) is the maximum mass of a stable white dwarf star. The limit was first indicated in papers published by Wilhelm Anderson and E. C. Stoner, and was named after Subrahmanyan Chandrasekhar, the Ind... |
46fbb8575d96b970 | Molecules from scratch without the fiendish physics
Molecules from scratch without the fiendish physics by Lisa Grossman.
From the post:
But because the equation increases in complexity as more electrons and protons are introduced, exact solutions only exist for the simplest systems: the hydrogen atom, composed of o... |
73f06a3ca8fee8c7 | There’s something wrong about the diffusion equation—but what exactly is it?
As promised last time, let me try to give you a “layman’s” version of the trouble about the diffusion equation.
1. Physical Situations Involving Diffusion
First of all, we need some good physical situations that illustrate the phenomenon of... |
c1a3f47ca11607f3 |
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I realize that path integral techniques can be applied to quantitative finance such as option value calculation. But I don't quite understand how this is done.
Is it possible to explain this to me in qualitative and quantitative te... |
2380b8b6ff64a028 | Saturday, January 31, 2009 ... Français/Deutsch/Español/Česky/Japanese/Related posts from blogosphere
Davos: Klaus met Gore for 2 hours
In Davos, Czech president Václav Klaus met Al Gore for two hours.
National Review, AFP
It was a friendlier encounter than the differences would suggest. Klaus summarized it by sayin... |
d135e74ff2d28d19 | How Physicists Fool the Gullible World
How Physicists Fool the Gullible World
(trop ancien pour répondre)
Pentcho Valev
2017-05-15 18:43:00 UTC
Raw Message
"Basically you can think of the division between the relativity and quantum systems as "smooth" versus "chunky" or continuously interconnected versus discretely s... |
e3af3faff4fd9f0e | Tuesday, 25 September 2007
Physicalism and Conciousness
As Colin McGinn has stated, "Consciousness defies explanation in [compositional, spatial] terms. Consciousness does not seem to be made up out of smaller spatial processes.... Our faculties bias us towards understanding matter in motion, but it is precisely thi... |
5d43982e3efb699d | Monthly Archives: July 2020
e, π and the Exponential Function
Throughout mathematics and its applications, we often encounter the numbers e and π. But what do they actually mean, what makes them so prevalent, and how are they related?
Both numbers are deeply intertwined with the exponential function, denoted exp, wh... |
4ea9239b0231e3b3 | Section 13.6: Angular Solutions of the Schrödinger Equation
m =
Please wait for the animation to completely load.
Most potential energy functions in three dimensions are not often rectangular in form. In fact, they are most often in spherical coordinates (due to a spherical symmetry) and occasionally in cylindrical ... |
66ba9f9164ac5522 | Energy input amplifies nonlinear dynamics of deep water wave groups
Thomas A A Adcock, Paul Taylor
Research output: Contribution to journalArticlepeer-review
5 Citations (Scopus)
A possible physical mechanism for the formation of freak waves on the open ocean is the localized interactions between wind and waves.Su... |
d8ecb4f996e8d5a1 | 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 Barrett
William Belsham
Henri Bergson... |
8caae9bc2cbb1fc5 | Quantum equation
What is Schrodinger’s equation used for?
The Schrodinger equation plays the role of Newton’s laws and conservation of energy in classical mechanics – i.e., it predicts the future behavior of a dynamic system. It is a wave equation in terms of the wavefunction which predicts analytically and precisely... |
ab9f65866d0f7015 | Describing Many Particles
A Quick Introduction to Quantum Mechanics
You probably already have some notion of what quantum mechanics is: it describes things at a very small scale and it says that nature obeys weird and counterintuitive rules. Here we’re going to give a brief rundown of the basics of quantum mechanics... |
2e28922f0d551292 | Riding Waves in Neuromorphic Computing
Marios Mattheakis
• John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
Physics 13, 132
An artificial neural network incorporating nonlinear waves could help reduce energy consumption within a bioinspired (neuromorphic) compu... |
d524055f2998657c | 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... |
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