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PeterDonis's latest activity
PeterDonis
replied to the thread
B
Is velocity the reason for the time dilation effect?
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If by this you mean that there will be a difference in time dilation factor between two worldlines in any frame, that is not correct...
Today, 1:48 AM
PeterDonis
replied to the thread
B
Is velocity the reason for the time dilation effect?
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No, not "time dilation in general"--only "time dilation" by Rindler's definition. Which, as has already been said, is what we in this...
Today, 1:21 AM
PeterDonis
replied to the thread
I
How to get metric field using a path dependent parallel propagator
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Have you even read the reference you gave? Do you understand what it is describing in the text around the equation you referenced? I...
Yesterday, 10:25 PM
PeterDonis
replied to the thread
I
Can there be structures made from neutrinos with angular momentum?
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Due to the lack of any valid references as a basis for discussion, this thread is closed.
Yesterday, 10:17 PM
PeterDonis
replied to the thread
I
Can there be structures made from neutrinos with angular momentum?
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No references that you have given deal with this at all. If you cannot find any references, then we have no valid basis for discussion.
Yesterday, 10:17 PM
PeterDonis
replied to the thread
I
Can there be structures made from neutrinos with angular momentum?
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Asking if something is "impossible" is a useless question in an area of physics in which there is still much research being done. Given...
Yesterday, 8:24 PM
PeterDonis
replied to the thread
I
Can there be structures made from neutrinos with angular momentum?
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"Could be part of it" is just handwaving for "we can't detect any effects of it". In other words, it's pure speculation in the absence...
Yesterday, 7:12 PM
PeterDonis
replied to the thread
I
Motivation behind the Operator-Formalism in QM
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If ##\hat{A}## represents an observable (and in principle any Hermitian operator can represent an observable), then a state...
Yesterday, 7:10 PM
PeterDonis
replied to the thread
I
Cosmology models and QFT
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Which are classical models, so they can't possibly say anything about QFT. Yes. Yes.
Yesterday, 7:07 PM
PeterDonis
replied to the thread
I
Cosmology models and QFT
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Having to estimate certain parameters in a classical model using a quantum model is not at all the same as having one's choice of...
Yesterday, 3:41 PM
PeterDonis
replied to the thread
I
Cosmology models and QFT
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The ##\Lambda C D M## model is a classical model (using classical GR), yes. However, some of the parameters in the model depend on our...
Yesterday, 3:26 PM
PeterDonis
replied to the thread
B
Is velocity the reason for the time dilation effect?
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As has already been pointed out, the term "time dilation" is ambiguous. The Rindler quote is referring to "time dilation" in the sense...
Yesterday, 3:24 PM
PeterDonis
replied to the thread
I
Unruh Radiation and Black Holes
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I note that one of the authors of this paper is Deur, who has published a number of papers arguing for the presence effects in GR that...
Yesterday, 2:49 PM
PeterDonis
replied to the thread
I
Unruh Radiation and Black Holes
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The Wikipedia article is not saying that the theoretical prediction of Unruh radiation is not disputed. What are disputed, according to...
Yesterday, 2:41 PM
PeterDonis
replied to the thread
I
What are Killing vectors?
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I assume you mean contraction with the inverse metric ##g^{\mu \nu}##?
Yesterday, 2:38 PM
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