bhobba's latest activity
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bhobba replied to the thread Graduate What Exactly Is The Physical Content Of Maxwell's Equations?.I only know of Wigner's version from a comment in Ohanian's Gravitation and Space-Time. It was actually my first serious book on GR... -
bhobba reacted to weirdoguy's post in the thread Graduate What Exactly Is The Physical Content Of Maxwell's Equations? with
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May or may not. Differential geometry is my specialisation within mathematical physics, and when I tried to study geometric algebra it... -
bhobba replied to the thread Graduate What Exactly Is The Physical Content Of Maxwell's Equations?.See: https://journals.aps.org/pr/abstract/10.1103/PhysRev.182.1397 It's been on my to-do list for ages to get down to my old uni...
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bhobba reacted to Sagittarius A-Star's post in the thread Graduate What Exactly Is The Physical Content Of Maxwell's Equations? with Like.
What also may help for understanding the EM field is to use Geometric Algebra, applied to 4D-spacetime. The wedge product ##\wedge##...
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bhobba reacted to PeterDonis's post in the thread Graduate What Exactly Is The Physical Content Of Maxwell's Equations? with
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Have you read Chapters 3 and 4 of Misner, Thorne, & Wheeler? That's where I first encountered the material that's briefly summarized in... -
When discussing isometric embeddings, there is a little more to it. The metric of the submanifold is taken to be induced from the...
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bhobba reacted to PeterDonis's post in the thread Undergrad Euclidean geometry and gravity with Like.
More precisely, by the Riemann curvature tensor that's derived from a metric via its Levi-Civita connection. There's no problem with...
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bhobba posted the thread Graduate What Exactly Is The Physical Content Of Maxwell's Equations? in Special and General Relativity.It doesn't contain anything new, and nothing I haven't seen before, but as people who have been around a while know, I have a bit of a...
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bhobba replied to the thread Graduate Quantum measurement problem (ie double slit experiment) question.Sorry. Yes, that is the paper. Thanks for picking it up. Thanks Bill
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bhobba reacted to gentzen's post in the thread Graduate Quantum measurement problem (ie double slit experiment) question with Like.
I guess you meant (copy&paste mistake): https://arxiv.org/abs/1712.06605
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bhobba replied to the thread Graduate Quantum measurement problem (ie double slit experiment) question.Like many things in QM, the situation is actually more nuanced than even standard QM textbooks sometimes suggest. The so-called...
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bhobba reacted to PeterDonis's post in the thread Graduate Quantum measurement problem (ie double slit experiment) question with Like.
Then you can't get single outcomes. Yes, but using a "reduced state" at all already assumes that you have a single outcome--without...
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bhobba reacted to PeterDonis's post in the thread Graduate Quantum measurement problem (ie double slit experiment) question with Like.
Short answer: no. The things you are vaguely describing all involve a change to the dynamics, making it no longer unitary. Indeed...
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bhobba reacted to PeterDonis's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Love.
And it seems as though your only reason for starting this thread in the first place was to try to get to a point where you could present...
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bhobba reacted to DaveC426913's post in the thread High School Is there anything in the Universe that is not fundamentally made up of matter? with Like.
We have all been trying to tell you how you can learn more, but you are rejecting everything we try to teach you. 🤔