PeterDonis's latest activity
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PeterDonis replied to the thread B Oberth Effect Near Sag A*.Not even close, based on calculations posted earlier in this thread. -
PeterDonis reacted to A. Neumaier's post in the thread I Modern View of Quantum Phenomena with
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This a mystery only for those who think the discrete quantum information approach carries the essence of quantum mechanics, and forgot... -
PeterDonis replied to the thread A Vortex loop stabilization in SU(N) gauge theory - DBI term approach.I'm not asking for your personal research. That's off limits for discussion here anyway. I'm asking for references that discuss the...
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PeterDonis replied to the thread A Vortex loop stabilization in SU(N) gauge theory - DBI term approach.Can you give a reference that discusses such theories?
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PeterDonis reacted to Bandersnatch's post in the thread I How to explain the strange pulsar in the Crab Nebula? with Like.
It's a pulsar wind nebula, with shock waves and a jet aligned with rotation axis. Not a vortex or a cone of radiation of the type that...
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PeterDonis replied to the thread B Realism about singularity.You don't have to "hypothetically" take a "realist view". You can just ask what the model of the universe with an initial singularity...
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I think you'd have to find somebody who believes that and ask them. As far as I understand it the question doesn't make sense because...
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PeterDonis replied to the thread I Question about "A Group Epimorphism is Surjective".Thread closed for moderation.
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The point of the thought experiment was to show that something was wrong with the then current (mid 1920s) understanding of QM - the...
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PeterDonis replied to the thread I Does action at a distance violate any conservation principles?.But such influences are not directly observable. All directly observable results are in accordance with standard QM. Standard QM obeys...
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PeterDonis reacted to bhobba's post in the thread I Physicists disagree wildly on what quantum mechanics says about real… with Like.
With my moderator's hat on, please no 'd**k measuring' contests. Let's discuss the physics. These things can often be found in the...
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PeterDonis reacted to Dale's post in the thread B Can an expanding EM be quantized: E=mc^2? with Like.
Yes. That is the only kind of photon that exists. They can (e.g. a diverging lens). They don’t always (e.g. a converging lens). Radio...
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PeterDonis replied to the thread I Wick-rotated Riemannian metric that takes leaky gravity into account.To have a meaningful discussion, we need some references, particularly for the statements quoted above. "As I understand it" and "I've...
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PeterDonis replied to the thread I Physicists disagree wildly on what quantum mechanics says about real….More precisely, our best current theories of physics do not contain any action at a distance, at least for one common meaning of that...
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See figure 1 in Taylor and Lineweaver, which is a distance-vs-time chart of the universe. The top chart has a horizontal scale in...