Demystifier's latest activity
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Demystifier replied to the thread I Are fields' reality only a relative one?.If the fields of the Standard Model are not fundamental, then what is? We don't know. It could be some other fields, or it could be... -
Demystifier replied to the thread A Is It Known For Sure Infinites In QFT Are Caused Using a Continuum?.I disagree https://www.physicsforums.com/threads/simulating-physics-the-current-status-of-lattice-field-theories.1014629/#post-6626056
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Demystifier replied to the thread A Is It Known For Sure Infinites In QFT Are Caused Using a Continuum?.There are two kinds on infinities in QFT, UV infinities and IR infinities. UV infinities are due to using a continuum (in both space and...
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Demystifier reacted to gentzen's post in the thread I What does the product part of Laughlin wave function mean? with
Like.
Yes, this is the meaning of that product symbol with two subscripts. -
Demystifier reacted to dextercioby's post in the thread Quantum "WHAT IS A QUANTUM FIELD THEORY?" A First Introduction for Mathematicians with Like.
Of course. All have erratas.
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Demystifier reacted to dextercioby's post in the thread Quantum "WHAT IS A QUANTUM FIELD THEORY?" A First Introduction for Mathematicians with
Informative.
Speaking of Folland's books, they are notorious for typos. Here's the errata for his 1st edition of the QFT book. -
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So I found out that this theory applies to the other sex in a similar way as well:
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Demystifier reacted to JimWhoKnew's post in the thread I Gauss' law seems to imply instantaneous electric field propagation with Like.
Equation (4) is correct in Coulomb gauge, where equation (3) holds everywhere, not only on the equatorial plane.
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Demystifier reacted to bhobba's post in the thread Quantum "WHAT IS A QUANTUM FIELD THEORY?" A First Introduction for Mathematicians with Like.
The book is fascinating. If your education includes a typical math degree curriculum, with Lebesgue integration, functional analysis...
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Demystifier replied to the thread I Gauss' law seems to imply instantaneous electric field propagation.That's an illegitimate assumption unless ##q(t)## is ##t##-independent. If ##q(t)## depends on ##t## then the charge is not conserved...
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Demystifier replied to the thread I The Extended Wigner's Friend Scenarios.What do you mean by electron path? It's not even defined, except in the Bohmian interpretation. Since the thought experiment is defined...
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Demystifier reacted to Nugatory's post in the thread I Commutation of operators for particle in a box with Like.
Does it? We have ##[H,P]=[P^2/2m,P]+[V(x),P]##; the first term is trivially zero but there’s no reason to expect the second one to be...
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Demystifier replied to the thread I Schrödinger equation and classical wave equation.Schrodinger didn't know what is the physical meaning of the wave. He only used the nonrelativistic energy formula $$E=\frac{p^2}{2m}+...
