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4953d4d2bb2bea84 | Standing With Israel
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Arieh Warshel
University of Southern California professor Arieh Warshel at an Oct. 9 press conference for his Nobel Prize in chemistry. (USC Photo/Gus Ruelas)
What is behind Israel’s recent string of Nobel Prize winners?
It could be tha... |
9538a725e0800105 | More “tweets”
Update (Feb. 4): After Luke Muelhauser of MIRI interviewed me about “philosophical progress,” Luke asked me for other people to interview about philosophy and theoretical computer science. I suggested my friend and colleague Ronald de Wolf of the University of Amsterdam, and I’m delighted that Luke took ... |
3c4a77f2502ab7a7 | Fritz London
Frank Field
The title of this little essay says it all: it is a memory after approximately 67 years of a man of whom I stood properly in awe at the time and for whom I have now even greater respect. I should say at the outset that I am writing this completely from memory with no reference t... |
ddde7d5ff73d6eea | Quantum mechanics
Quantum mechanics, science dealing with the behaviour of matter and light on the atomic and subatomic scale. It attempts to describe and account for the properties of molecules and atoms and their constituents—electrons, protons, neutrons, and other more esoteric particles such as quarks and gluons.... |
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Paradox seemingly violating relativity
1. Sep 29, 2008 #1
i thought of a paradox that i'm not sure i can resolve for myself.
You have a 1-dim potential well of length L. You measure a particle to be within [tex]x=L/2\pm \sigma[/tex] with equal probability. Assume ... |
c52b5c89dc555f15 | Psychology Wiki
Many-minds interpretation
34,142pages on
this wiki
Revision as of 19:08, September 21, 2006 by Lifeartist (Talk | contribs)
The many-minds interpretation of quantum mechanics extends the many-worlds interpretation by proposing that the distinction between worlds should be made at the level of the ... |
3e56496c1be347ff | Bohr’s shell model
In 1913 Bohr proposed his quantized shell model of the atom (see Bohr atomic model) to explain how electrons can have stable orbits around the nucleus. The motion of the electrons in the Rutherford model was unstable because, according to classical mechanics and electromagnetic theory, any charged p... |
0a3b4105416ebc48 |
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The fomula h/lambda is this for the photon only?
1. Feb 25, 2006 #1
the fomula [tex]\frac{h}{\lambda}[/tex]
is this for the photon only? or can it be applied to relativistic electrons too?
2. jcsd
3. Feb 25, 2006 #2
it applies to particl... |
028ef8884111d023 | University has become an arms race: We must give students an alternative
Kristian Niemietz
THESE are not great times to graduate from university. Against the backdrop of a declining graduate premium (the difference between the earnings of graduates and non-graduates), university fees have shot up, and both the graduat... |
faf47b72d623fb5f | Eigenvalues and eigenvectors
From Wikipedia, the free encyclopedia
(Redirected from Eigenvalue)
Jump to: navigation, search
"Characteristic root" redirects here. For other uses, see Characteristic root (disambiguation).
In linear algebra, an eigenvector or characteristic vector of a linear transformation is a non-z... |
1c7c24d36c1bd7b7 | Notes to Causal Determinism
1. Some philosophers are misled on this point by the fact that some now-defunct presentations of Special Relativity theory seem to be grounded on an ontology of events. But Special Relativity does not need to be so presented, nor were the “events” used anything like common sense events.
2.... |
71cf7227c027e707 | An off-line question from someone at Seed:
Fundamentally, what is the difference between chemistry and physics?
There are a bunch of different ways to try to explain the dividing lines between disciplines. My take on this particular question is that there’s a whole hierarchy of (sub)fields, based on what level of abs... |
547454a478a32bb1 | Phase space formulation
From Wikipedia, the free encyclopedia
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The conceptual ideas underlying the development of quantum mechanics in phase space have branched into mathematical offshoots such as algebraic deformation theory (cf. Kontsevich quantization formula) and noncommutative... |
f1048ef7077bda1b | This is a well known problem (see for instance this survey) in the area of “quantum chaos” or “quantum unique ergodicity”; I am attracted to it both for its simplicity of statement (which I will get to eventually), and also because it focuses on one of the key weaknesses in our current understanding of the Laplacian, n... |
5e3ff09d384a9281 | Monday, May 28, 2018
Simplicity in photographic art.
“Monday Blues Chat”
By Erin Photography
Matthew Rapaport said...
Thanks Dr. H. I'm looking forward to it. Of course physicists use the term in a technical way only tangentially connected to beauty as the term is commonly used and like the question ... |
a7c7a41b75b0fb34 | 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... |
2eaeb121e06060dd | Feynman's QED
The new edition of Feynman's QED: The Strange Theory of Light and Matter
I was invited to write an introduction to the new edition of Feynman's classic book on quantum electrodynamics. For those interested, here is the introduction.
The story of how we came to know light makes for one gripping drama, c... |
42c509779de477e0 | SciELO - Scientific Electronic Library Online
vol.35 issue2AThe classical and commutative limits of noncommutative quantum mechanics: a superstar * Wigner-Moyal equationClassical trajectories and quantum field theory author indexsubject indexarticles search
Home Pagealphabetic serial listing
Services on Demand
... |
fef38f1cc681e9ee | Two-Soliton Collision for the Gross-Pitaevskii Equation in the Causal Interpretation
Under certain simplified assumptions (small amplitudes, propagation in one direction, etc.), various dynamical equations can be solved, for example, the well-known nonlinear Schrödinger equation (NLS), also known as the Gross–Pitaevsk... |
3488c378f65fbe1b | Using Swedenborg to Understand the Quantum World III: Thoughts and Forms
Swedenborg Foundation
In this series of posts, Swedenborg’s theory of correspondences has been shown to have interesting applications for helping us to better understand the quantum world.
In part I, we learned that our mental processes occur... |
ed94ffba46cec983 | The imaginary part of quantum mechanics really exists!
Credit: Source: USTC
For almost a century, physicists have been intrigued by the fundamental question: why are complex numbers so important in quantum mechanics, that is, numbers containing a component with the imaginary number i? Usually, it was assumed that t... |
7b70a04cf419e9d4 | Virtual Winter School on Computational Chemistry
Cecam Logo
From the Schrödinger Equation to the Dirac Equation and Beyond: Are Relativistic Effects Important for Chemistry?
Peter Schwerdtfeger
Centre of Theoretical Chemistry and Physics, Institute of Fundamental Sciences, Massey University (Albany Campus), Aucklan... |
beb1178669c86ab7 | Which Font Has Zero With Slash Through?
What font has a line through zero?
Typefaces commonly found on personal computers that use the slashed zero include:Terminal in Microsoft’s Windows line.Consolas in Microsoft’s Windows Vista, Windows 7, Microsoft Office 2007 and Microsoft Visual Studio 2010.Menlo in macOS.Monac... |
8349f671afc212be | 9360-0130/02 – Introduction to Quantum Physic and Chemistry Theory (KFCH)
Gurantor departmentCNT - Nanotechnology CentreCredits5
Subject guarantorprof. Ing. Jana Seidlerová, CSc.Subject version guarantorprof. Ing. Jana Seidlerová, CSc.
Study levelundergraduate or graduateRequirementCompulsory
Study languageCzech
Year ... |
6f994d391338fec1 | Download Modern Physics
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72563f0268de73eb | Herb Zinser explains the Alan Sokal science wars of atoms, math equations, biochemistry molecules, television photons, English language nouns and symbol life. Nature's military SYMBOL MACHINE set-up of the New York Times, Duke University, etc.
The Argonne National Labs brain electron orbital war report from the brain ... |
bcda02e14c675fda | , , , , , , , , ,
Photo by Flo Westbrook from Pexels
The foundation stone of quantum mechanics doesn’t just describe the behavior of infinitesimal subatomic particles – it also governs the movement of the largest and most massive objects in the Universe, says a prominent astrophysicist.
Planetary scientist Konstanti... |
0682a073c588c68c | Approaches to non-adiabatic calculations
Tags: ExcitedStates
The problem of modelling electronic transitions caused by interactions with ions is formidably difficult. Standard approaches to electronic structure assume that the electrons move on a single energy surface defined by static ions (often called the Born-Opp... |
701bf6f4086276b9 | WATOC 2017
See you all in 2020!
Photosynthesis and Singlet Fission – #WATOC2017 PO1-296
If you work in the field of photovoltaics or polyacene photochemistry, then you are probably aware of the Singlet Fission (SF) phenomenon. SF can be broadly described as the process where an excited singlet state decays to a... |
a713b3f777bb85fc | måndag 31 mars 2014
Planck's Constant = Human Convention Standard Frequency vs Electronvolt
The recent posts on the photoelectric effect exhibits Planck's constant $h$ as a conversion standard between the units of light frequency $\nu$ in $Hz\, = 1/s$ as periods per second and electronvolt ($eV$), expressed in Einste... |
68c39e32c6eb0fee | måndag 19 december 2016
New Quantum Mechanics 21: Micro as Macro
The new quantum mechanics as realQM explored in this sequence of posts offers a model for the microscopic physics of atoms which is of the same form as the classical continuum mechanical models of macroscopic physics such as Maxwell's equations for elec... |
02f1e0ab209c89a7 |
Particles' wave functions always spread superluminally
By these comments, Jacques says that he is ignorant about many things that I (and my instructors) considered basics of quantum field theory since I was an undergraduate, such as:
1. The special theory of relativity and quantum mechanics are consistent but t... |
eec83ce06ae42610 | Magnetism: mathematical aspects
From Scholarpedia
Vieri Mastropietro and Daniel C. Mattis (2010), Scholarpedia, 5(7):10316. doi:10.4249/scholarpedia.10316 revision #91450 [link to/cite this article]
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Already as an infant, Albert Einstein (Nobel prize winner, 1921) wondered about the physics... |
8de03cf51da7652d | Saturday, January 21, 2012
Some parallels between classical and quantum mechanics
This isn't really a blog post. More of something I wanted to interject in a discussion on Google plus but wouldn't fit in the text box.
I've always had trouble with the way the Legendre transform is introduced in classical mechanics. I... |
478928514b8df0ed | Monday, August 31, 2015
Evidence of ancient life discovered in mantle rocks deep below the seafloor
Physicalist who has learned his lessons sees life, evolution, generation of genetic code, etc.. as random thermal fluctuations. Empirical facts suggests that the situation is just the opposite. The emergence of life se... |
4d2b29636dfa40b6 | unbounded operator
This page is about unbounded linear operators on Hilbert spaces. For operators on Hilbert spaces, “bounded” and “continuous” are synonymous, so the first question to be answered is: Why consider unbounded, i.e., discontinuous operators in a category that is a subcategory of Top? The reason is simp... |
9cc62de205327c13 | Take the 2-minute tour ×
My question derives from reading a recent preprint (arXiv:1209.0827v1, in particular Section 4.1), but it can be phrased quite independently from that paper. The setup is as follows.
Let $A$ be the tridiagonal $n\times n$ matrix with $a_{ii} = -1$ on the main diagonal and $a_{i,i+1} = a_{i+1,... |
e68d92982a8f1eac | Problems with Bohmian mechanics
(also called the de Broglie-Bohm interpretation of quantum mechanics)
This is the most popular interpretation of quantum physics in terms of hidden variables, that are the "positions of particles". These hidden variables behave in a "deterministic" way that, in order to fit with the EP... |
e1e127d00205d042 | The Molecular Universe
PDF file of this section
We have emphasized the unique model building power of contemporary computers. How can we exploit this power to learn about the behavior of atoms and molecules? Two broad strategies are available to contemporary scientists. In the first, we attempt to solve the Schrödin... |
e32bf451da17d890 | The Classical and Quantum Mechanics of a Thin Ring Spinning About Two Axes
San José State University
Thayer Watkins
Silicon Valley
& Tornado Alley
The Classical and Quantum Mechanics
of a Thin Ring Spinning About Two Axes
The Classical Analysis
Consider a thin ring of mass M and radius R. (Here thin means that it... |
c4b3f01201b69b33 | Psychology Wiki
Quantum chemistry
34,146pages on
this wiki
This article is a historical introduction to the theoretical concepts of quantum chemistry. For information on computational methods in chemistry and more recent and/or technical aspects of quantum chemistry, see computational chemistry. For theoretical conce... |
aee6c1c8300448ca | Dyson formula
physics, mathematical physics, philosophy of physics
Surveys, textbooks and lecture notes
theory (physics), model (physics)
experiment, measurement, computable physics
The Dyson formula is an expression for the solution of the Schrödinger equation in time dependent quantum mechanics.
It expresse... |
c389bdf24fc136e7 | What Is Quantum Mechanics Good for?
Physicist James Kakalios, author of The Amazing Story of Quantum Mechanics, wants people to know what quantum physics has done for them lately--and why it shouldn't take the rap for New Age self-realization hokum such as The Secret
What could be weirder than quantum mechanics? Thi... |
bd3d1fb9d071d1e2 | general physics
Predicting a supernova precursor (on SN2010mc)
Dust Dendrites
After the dust settled down (literally…), we found something quite bizarre. The nylon walls developed very beautiful dust dendrites, akin to the more familiar frost dendrites (like these frost dendrites I have seen while living in Toront... |
1fdeaa838d706ada | Chandrasekhar limit
From New World Encyclopedia
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The Chandrasekhar limit limits the mass of bodies made from electron-degenerate matter, a dense form of matter which consists of atomic nuclei immersed in a gas of electrons. The limit is the maximum nonrotating mass of an object that can be ... |
c96b2267c2136afa | lördag 21 januari 2017
The Origin of Fake Physics
Peter Woit on gives on Not Even Wrong a list of fake physics most of which can be traced back to the fake physics character of Schrödinger's linear multi-dimensional equation, as exposed in recent posts.
Woit's list of fake physics thus includes different fantasies o... |
9ff5ff3ac2637ee3 | Collapse Theories
First published Thu Mar 7, 2002; substantive revision Tue Feb 16, 2016
Quantum mechanics, with its revolutionary implications, has posed innumerable problems to philosophers of science. In particular, it has suggested reconsidering basic concepts such as the existence of a world that is, at least to... |
1cbc9a371cb8d6cb | CONSIDER a verbal description of the effect of gravity: drop a ball, and it will fall.
That is a true enough fact, but fuzzy in the way that frustrates scientists. How fast does the ball fall? Does it fall at constant rate, or accelerate? Would a heavier ball fall faster? More words, more sentences could provide detai... |
44ce52f7570454bf | Why did Nature Invent Spin?
13 thoughts on “Why did Nature Invent Spin?
1. There are papers on this sort of thing, Alexander, but they struggle to get into journals, and then they struggle to get any publicity. See for example http://www.cybsoc.org/electron.pdf and look at the picture on page 6. Note the dark... |
25953c1cf768d0d9 | HYLE--International Journal for Philosophy of Chemistry, Vol. 11, No.2 (2005), pp. 101-126.
Copyright © 2005 by HYLE and Valentin N. Ostrovsky
HYLE Article
Towards a Philosophy of Approximations in the ‘Exact’ Sciences
Valentin N. Ostrovsky*
Abstract: The issue of approximations is mostly neglected in the philosop... |
05a034e80ebb9abb | I Drove The Tesla P85D, And Now Nothing I Drive Will Feel The Same Way Again
Growing up, life is full if a lot of “firsts” that we can somehow always seem to remember, be they influential on the rest of our life or not. My first kiss was a girl named Heather, my first car was a Mercury Villager minivan, and the firs... |
6bf35f161d7a9ea8 | Monday, December 22, 2008
Gregory Chaitin
Anyone who is interested in "The meaning of life the universe and everything" type stuff needs to keep tabs on Gregory Chaitin's work, such as this:
and this
Is God a computer programmer?
I have a feeling this guy lacks enough inhibition to not worry about being a bit of ... |
c328c8e7f80689a3 |
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Quantum time corr: expectation value of particle motion in Schro. pic
1. Mar 9, 2013 #1
The expectation value of motion of a particle over a time interval t-to is
C(t,to) = <0|x(t)x(to)|0>
(product of position operators in Heisenberg represe... |
ffa0333582ca32af | All Issues
Volume 38, 2018
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edcebb5afb40b3b6 | Take the 2-minute tour ×
In quantum mechanics when we talk about the wave nature of particles are we referring in fact to the wave function? Does the wave function describes the probability of finding a particle (ex: photons) at some location? So do the "waves" describe probabilities just the way in classical physics ... |
4aebb1eef85edbd8 | In 2012, Mathematician Ian Stewart came out with an excellent and deeply researched book titled "In Pursuit of the Unknown: 17 Equations That Changed the World."
His book takes a look at the most pivotal equations of all time, and puts them in a human, rather than technical context.
"Equations definitely can be dull,... |
466cf99d897dac80 | History of mathematical notation
From Wikipedia, the free encyclopedia
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The history of mathematical notation[1] includes the commencement, progress, and cultural diffusion of mathematical symbols and the conflict of the methods of notation confronted in a notation's move to popularity or in... |
b2e1560459d1ef76 | ATD 219-242
Page 219
they would have little clue . . . their more or less ambushed keesters
One of half a dozen Pynchonian circumlocutions for "wouldn't know [blank] if it bit them in the ass."
The Tetractys
True Worshippers of the Ineffable Tetractys
The Tetractys is a triangular figure consisting of ten points ... |
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Comment Re:Clickbait (Score 0) 130
Hmm, theoretically impossible? I guess, *in principle*, any user could always just reformat and install Windows XP, but granting that at least *some* system components can be trusted, there is the notion of http://en.wikipedia.org/wiki/Proof-carrying_code/ w... |
ffcf71d430d40786 | There are plenty of free particles — particles outside any square well —in the universe, and quantum physics has something to say about them. The discussion starts with the Schrödinger equation:
Say you’re dealing with a free particle whose general potential, V(x) = 0. In that case, you’d have the following equation:... |
95e92c807b8cc912 | Covalent bond
From Wikipedia, the free encyclopedia
(Redirected from Covalent bonds)
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A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs and the stable balance of attractive and repu... |
fcaa43dcfcc679d0 | Varieties of Emergence
David J. Chalmers
Department of Philosophy
University of Arizona
Tucson, AZ 85721.
[[Written for the Templeton Foundation workshop on emergence in Granada, August 2002. Given the informal nature of the workshop, I haven't been especially careful with citations and such, but I should note up fr... |
5f3d2d698c43755a | Take the 2-minute tour ×
How can energy be quantized if we can have energy be measured like in 1.56364, 5.7535, 6423.654 kilo joules, with decimals? Thanks
Also isnt it quantization means energy is represented in bit quantities meaning you can not divide, lets say 1 bit of energy
share|improve this question
3 Answe... |
de15a0f26bd77a15 | 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... |
4f5690e785ee0e56 | Take the 2-minute tour ×
I have seen similar posts, but I haven't seen what seems to be a clear and direct answer.
Why do only a certain number of electrons occupy each shell? Why are the shells arranged in certain distances from the nucleus? Why don't electrons just collapse into the nucleus or fly away?
It seems t... |
24e533cca420fa76 | Theoretical Concepts and Reaction Mechanisms
Yuri V. Il'ichev
Cordis Corporation, a Johnson and Johnson Company
P.O. Box 776, Welsh and McKean Roads, Spring House, PA 19477-0776
1. Chemistry of Electronically Excited States
Aren't you excited already? Not yet? Let us then adopt a step-by-step approach in order to i... |
8cd1fc87fef9ed4f | Mathematical analysis
From Wikipedia, the free encyclopedia
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A strange attractor arising from a differential equation. Differential equations are an important area of mathematical analysis with many applications to science and engineering.
Mathematical analysis is a branch of mathematics de... |
15ecc27e1e218ae4 | Listen & Subscribe
Get The Latest Finding Genius Podcast News Delivered Right To Your Inbox
Dr. Robin Smith, Lecturer in Physics at Sheffield Hallam University, UK, delivers an insightful overview of his work in nuclear physics research topics and experiments in nuclear physics.
Dr. Smith earned his Ph.D. in nuclear... |
dff9332c65ceeed5 | Wednesday, November 6, 2013
old posts from
This is a collection of old blog posts, going back to 2006. For some strange reason I thought it would be a good idea to have two blogs. They have been migrated here from
a philosophy of science primer - part III
• part I: some history of science and logical empiricism,
... |
4dfe73161a5c4e82 | Orbital hybridisation
From Wikipedia, the free encyclopedia
(Redirected from Orbital hybridization)
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Not to be confused with s-p mixing in Molecular Orbital theory. See Molecular orbital diagram.
Four sp3 orbitals.
Three sp2 orbitals.
In chemistry, hybridisation (or hybridization) is the ... |
2ce3495d19cfae05 | Cells Cells 2073-4409 MDPI 10.3390/cells3010001 cells-03-00001 Article Macroscopic Quantum-Type Potentials in Theoretical Systems Biology NottaleLaurent CNRS, LUTH, Paris Observatory and Paris-Diderot University, Meudon Cedex 92195, France; E-Mail: laurent.nottale@obspm.fr; Tel.: +33-145-077-403 03 2014 30 12 2013 3 1 ... |
01c2290a771d66f9 | From Wikipedia, the free encyclopedia
(Redirected from Faster than light travel)
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"Faster than the speed of light" redirects here. It is not to be confused with Faster Than the Speed of Night.
Faster-than-light (also superluminal or FTL) communication and travel refer to the propagation of... |
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Comment Re:Impossible (Score 1) 600
>We still have no idea what caused the Universe to exist
Stop please. If you had even an inkling of what you were talking about, you would know that question doesn't even make sense.
>Interestingly there are thousands o... |
a1ba814ad9bbb2a0 | This Quantum World/Implications and applications/Beyond hydrogen: the Periodic Table
From Wikibooks, open books for an open world
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Beyond hydrogen: the Periodic Table[edit]
If we again assume that the nucleus is fixed at the center and ignore relativistic and spin effects, then the station... |
4aa851570f8dfa7f | Take the tour ×
When I read descriptions of the many-worlds interpretation of quantum mechanics, they say things like "every possible outcome of every event defines or exists in its own history or world", but is this really accurate? This seems to imply that the universe only split at particular moments when "events" ... |
ba14014a94e925b8 | Orbital hybridization
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Four sp3 orbitals.
Three sp2 orbitals.
In chemistry, hybridization (or hybridisation) is the concept of mixing atomic orbitals into new hybrid orbitals suitable for the pairing of electrons to form chemical bonds in valence bond t... |
63a57d8783355653 | Skip to main content
Fractional-calculus diffusion equation
Sequel to the work on the quantization of nonconservative systems using fractional calculus and quantization of a system with Brownian motion, which aims to consider the dissipation effects in quantum-mechanical description of microscale systems.
The ca... |
cdc3ad3b5f4e8137 | Inverse Spectral Theory for a Singular Sturm Liouville Operator with Coulomb Potential
DOI: 10.4236/apm.2016.61005 PDF HTML XML 4,650 Downloads 5,309 Views
We consider the inverse spectral problem for a singular Sturm-Liouville operator with Coulomb potential. In this paper, we give an asymptotic formula... |
61c9407e17b0e097 | Monads, Vector Spaces and Quantum Mechanics pt. II
I had originally intended to write some code to simulate quantum computers and implement some quantum algorithms. I’ll probably eventually do that but today I just want to look at quantum mechanics in its own right as a kind of generalisation of probability. This is p... |
cbf8b6a26e402920 | The Book of Universes by John D. Barrow (2011)
This book is twice as long and half as good as Barrow’s earlier primer, The Origin of the Universe.
In that short book Barrow focused on the key ideas of modern cosmology – introducing them to us in ascending order of complexity, and as simply as possible. He managed to ... |
109741395c64c1cc | Institute for Nuclear Research
MTA Certificate of Research Excellence
Exactly solvable problems in quantum mechanics
Email address
Research area Quantum physics
Participants in the research work
Quantum systems are usually described in terms of the Schrödinger equation that contains a potential accounting for the in... |
4ecd6089ba592bef | Skip to main content
Self-similarity property of acoustic data acquired in shallow water environment
Underwater acoustic modeling in shallow water environment is difficult since sound waves reflect several times between the surface and the water bottom. This article discusses an underwater acoustic characteristics ... |
0a3adfb29662f594 | The Imaginary Energy Space
Original post:
Intriguing title, isn’t it? You’ll think this is going to be highly speculative and you’re right. In fact, I could also have written: the imaginary action space, or the imaginary momentum space. Whatever. It all works ! It’s an imaginary space – but a very real one, because ... |
943ba2ced0642e21 | The Time-Energy Uncertainty Relation
John Baez
April 10, 2010
In quantum mechanics we have an uncertainty relation between position and momentum:
(Δq) (Δp) ≥ /2
Now, as you probably know, time is to energy as position is to momentum, so it's natural to hope for a similar uncertainty relation between time and energ... |
5f8ec527a5f04c67 | Sign up ×
The Feynman lectures are universally admired, it seems, but also a half-century old. Taking them as a source for self-study, what compensation for their age, if any, should today's reader undertake? I'm interested both in pointers to particular topics where the physics itself is out-of-date, or topics where ... |
d72f9ff1252cc357 | Page semi-protected
Properties of water
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(Redirected from Water (molecule))
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"Hydrogen monoxide" redirects here. For the hoax involving the chemical name of water, see Dihydrogen monoxide hoax.
"H2O" and "HOH" redirect here. For other uses, see H2O (di... |
214d27a7e81f90ea | AQME Advancing Quantum Mechanics for Engineers
by Tain Lee Barzso, Dragica Vasileska, Gerhard Klimeck
Introduction to Advancing Quantum Mechanics for Engineers and Physicists
“Advancing Quantum Mechanics for Engineers” (AQME) toolbox is an assemblage of individually authored tools that, used in concert, offer educa... |
c845edd8502122e7 | 3 The Schrödinger equation
If the electron in an atom of hydrogen is a standing wave, as de Broglie had assumed, why should it be confined to a circle? After the insight that particles can behave like waves, which came ten years after Bohr’s quantization postulate, it took less than three years for the full-fledged (a... |
3105a63a0cd88043 | Support Options
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Quantum Mechanics: Hydrogen Atom and Electron Spin
By Dragica Vasileska1, Gerhard Klimeck2
1. Arizona State University 2. Purdue University
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A hydrogen atom is an atom of the chemical eleme... |
f1cb722fedf6486d | Frank Wilczek
From Wikiquote
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Frank Wilczek
Frank Anthony Wilczek (born May 15, 1951) is an American physicist and Nobel laureate (2004).
• The answer to the ancient question "Why is there something rather than nothing?" would then be that ‘nothing’ is unstable.
Longing for the Harmoni... |
35a97a38705273a5 | Monday, January 30, 2012
LHC Multilepton Search Unimpressive So Far
They looked at events with at least four leptons (electrons and muons) and some missing transverse momentum. In the inclusive selection, they observed 4 events while the expectation was 1.7 ± 0.9 events; that's roughly a 2.5-sigma excess although one... |
e2d4d910920ecc00 | "The Solar Wind as a Turbulence Laboratory"
Roberto Bruno and Vincenzo Carbone
1 Introduction
1.1 What does turbulence stand for?
1.2 Dynamics vs. statistics
2 Equations and Phenomenology
2.1 The Navier–Stokes equation and the Reynolds number
2.2 The coupling between a charged fluid and the magnetic field
2.3 Scaling ... |
d3e3e63c5cf94ed3 |
In 1916, Albert Einstein put the finishing touches on his Theory of General Relativity, a journey that began in 1905 with his attempts to reconcile Newton’s own theories of gravitation with the laws of electromagnetism. Once complete, Einstein’s theory provided a unified description of gravity as a geometric property... |
7da554581baac975 | A note on optimal H^1-error estimates for Crank-Nicolson approximations to the nonlinear Schrödinger equation
by Patrick Henning, et al.
In this paper we consider a mass- and energy--conserving Crank-Nicolson time discretization for a general class of nonlinear Schrödinger equations. This scheme, which enjoys popul... |
501f41b0ff12b8b5 | Quantum Mechanical Model
Quantum Mechanical Model
Bohr's Cencept of well defined circualr orbits was discarded after the wave character of electron (De Broglie) and heisenberg's uncertainty Principle was established.Then came the concept of Quantum Mecahnics or wave mechanics which described the behaviour the electro... |
443d78337ae3689a | Correlated Rotational Alignment Spectroscopy
Raman Lab Course Guidelines
In the 2021 lab course, you are expected to analyze molecular structures based on rotational Raman spectroscopic results. Here is the 2021 lab course guideline: PC_lab_course_CRASY_Schultz Here is a 2018 lab guide for setting up an experiment to... |
19cecf674af30c24 | Quantum Physics For Dummies, Revised Edition
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In quantum physics, you can decouple systems of particles that you can distinguish — that is, systems of identifiably different particles — into linearly independent equations. To illustrate this, suppose you have a system of many diffe... |
cb290788a68f80e9 | SEMITIP V6, Technical Manual
Technical instructions are provided below for SEMITIP version 6, in the sections: Additional information on the theory behind the SEMITIP package can be found in Refs. [1]-[6] and in the documents:
The SEMITIP version 6 software package contains a set of programs for computing the electr... |
570171d11d68f053 | In 2013, David Lopez and I discovered some weird MRI signals. When I saw the time series data, I knew immediately that those signals were generated by something we couldn't explain with conventional MRI physics.
Around 6 years earlier, I had started thinking about quantum brain processes. For me, it was clear from the... |
569354ec2a4bde1b | Scholarly article on topic 'Focus on Cold and Ultracold Molecules'
Focus on Cold and Ultracold Molecules Academic research paper on "Nano-technology"
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Academic research paper on topic "Focus on Cold and Ultracold Molecules"
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