PeterDonis's latest activity
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PeterDonis reacted to Matterwave's post in the thread Undergrad Is there a direct link between Newton’s gravitational formula and a quantum theory of gravitation? with
Like.
Generally speaking, a quantum theory of gravitation should reproduce general relativity in the appropriate limit. General relativity... -
PeterDonis reacted to Dale's post in the thread Undergrad Is there a direct link between Newton’s gravitational formula and a quantum theory of gravitation? with Like.
If the new theory doesn’t reduce to the old one in the appropriate limits, then the new theory is falsified by existing experimental...
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PeterDonis reacted to Ibix's post in the thread Undergrad Is GR superior to Newtonian gravity? with Like.
I think that depends on what you mean by "reasonable", and whether Newtonian theory is better at it probably depends what you mean by...
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PeterDonis replied to the thread Undergrad Is GR superior to Newtonian gravity?.I have no idea what you are basing that on. Newtonian gravity, the theory, says nothing whatever about what mass distributions are...
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PeterDonis replied to the thread Undergrad Is GR superior to Newtonian gravity?.@renormalize I deleted the post you just responded to.
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PeterDonis replied to the thread Undergrad Is GR superior to Newtonian gravity?.How does the "scalar" ##\Phi## in this theory have to transform when you change frames, in order for the tensor ##T^{\mu \nu}## that it...
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PeterDonis reacted to PAllen's post in the thread Undergrad Is GR superior to Newtonian gravity? with Like.
But total mass/energy is a source in a relativistic gravity theory, and that is definitely NOT a Lorentz scalar. For example, a system...
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PeterDonis replied to the thread Undergrad Is GR superior to Newtonian gravity?.For rest mass, you should really say "invariant mass"--the magnitude of the object's 4-momentum vector. For binding energy, if you're...
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PeterDonis replied to the thread Graduate Do any Bell papers plot raw data for non-entangled controls?.Can you give specific references for these statements?
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PeterDonis replied to the thread Graduate Why is Bell’s theorem still considered controversial?.@danieltanfh95 the reference you provided in response to @Sambuco is (a) your own work, and (b) only just published this year, meaning...
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PeterDonis replied to the thread Graduate Do any Bell papers plot raw data for non-entangled controls?.This isn't possible; that's not how SPDC works. Either you get a pair of entangled photons triggered by the input "pump" photon, or you...
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PeterDonis replied to the thread Graduate Why is Bell’s theorem still considered controversial?.That's correct. Also please bear in mind one of the things that is said in the guidelines for this subforum, that the kinds of...
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PeterDonis replied to the thread Undergrad Is GR superior to Newtonian gravity?.Just looked, it's actually a series of three problems, Exercises 7.1, 7.2, and 7.3.
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PeterDonis replied to the thread Undergrad Is GR superior to Newtonian gravity?.Which also, of course, is not a complete theory (although it is useful as an approximation in the weak field regime), since it also...
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PeterDonis reacted to Matterwave's post in the thread Graduate Why is Bell’s theorem still considered controversial? with Like.
I see some hedging with the (somewhat), but it seems your view is basically that of orthodox QM? It is called "orthodox" because it is...