PeterDonis's latest activity
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PeterDonis replied to the thread B Matter density right after the decoupling.Yes. Yes, ##z = 0## means now. Yes. How does that compare to, say, the number density of particles per cubic meter in air at the... -
PeterDonis replied to the thread B Matter density right after the decoupling.Yes. But you don't need to know that to do the calculation I described in post #2.
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PeterDonis replied to the thread B Matter density right after the decoupling.The Wikipedia page you linked to gives a formula for the number density of hydrogen as a function of the redshift ##z##. From that you...
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PeterDonis replied to the thread B Need help understanding particle physics and quantum physics.They're what our best current theory of the fundamental physics of matter says everything is made of. If that makes them "physical...
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PeterDonis replied to the thread B Need help understanding particle physics and quantum physics.Quantum fields. There is no other answer as far as physics is concerned, at least not with our best current models. Quantum fields are...
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PeterDonis replied to the thread B Need help understanding particle physics and quantum physics.According to our best current theoretical models, they're quantum fields. Yes. This is much too vague. We can't give you a course in...
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PeterDonis replied to the thread I The Extended Wigner's Friend Scenarios.I didn't use the word "path", nor does my argument depend on the electron having a particular path. My point was simply that there is a...
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PeterDonis replied to the thread A Collapse of wave function and consciousness.This is really a separate question from the one you're asking in this thread. If you want to discuss the Penrose-Hameroff proposal...
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PeterDonis replied to the thread A Collapse of wave function and consciousness.Moderator's note: Thread moved to the QM interpretations subforum.
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PeterDonis reacted to DaveC426913's post in the thread A three month long summer vacation from public school seems stupid with
Like.
And this happens magically? As someone who works as support staff in education, I can tell you that the work put in at graduation and... -
PeterDonis replied to the thread A three month long summer vacation from public school seems stupid.Maybe for you. But not everyone shares your preferences. And there is no reason why your preferences should override everyone else's...
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PeterDonis replied to the thread A three month long summer vacation from public school seems stupid.I'm inferring it from your posts. I've already said I don't think lower productivity is due to poor education. So I don't agree with...
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PeterDonis replied to the thread I Is there a bad intuition or bad explanation in quantum entanglement?.This is getting way off topic. Please keep the discussion focused on QM and the thread topic.
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PeterDonis replied to the thread I A very interesting paper on orthodox quantum mechanics.In his textbook, he gives basically the same description you quoted, but he also says that an equivalent way of looking at the quantum...
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PeterDonis replied to the thread I A very interesting paper on orthodox quantum mechanics.This is how Ballentine presents the statistical interpretation--the ensemble is basically the abstract set of all instances of a given...