PeterDonis's latest activity
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PeterDonis replied to the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture.No, the specification of the experiment assigns an entangled state to the friend + system once they have interacted, because of the... -
PeterDonis replied to the thread Graduate Sidney Coleman's opinion on interpretation in his Dirac lecture.No, it doesn't. It's a property of the joint quantum state of the two particles (that it can't be factorized into a product of states of...
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PeterDonis replied to the thread Graduate Quaternionic Rays instead of Complex.Can you give an example? This isn't something I'm familiar with.
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PeterDonis reacted to Orodruin's post in the thread Undergrad How Is Intrinsic Curvature Measured in Higher Dimensions Like 4D Spacetime? with
Like.
Not only why, but ”you cannot”. It is impossible to do it without parallel transport - or at least without parallel transport being... -
PeterDonis reacted to weirdoguy's post in the thread High School Knowledge and information in the physical world with Like.
He is not rude, just straight to the point. We are not talking about opinions here, we are talking about facts. Either what you say...
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PeterDonis replied to the thread Undergrad Why is the Lorentz Force always perpendicular to velocity?.There's no way to define "Lorentz force" as being solely due to the magnetic field and have the definition be covariant. And if we...
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PeterDonis replied to the thread High School Knowledge and information in the physical world.I didn't assume that you hadn't. Indeed, my post said you had. I'm glad you agree.
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PeterDonis replied to the thread High School Knowledge and information in the physical world.No, @Paul Colby said that. I didn't qualify my statement about entangled particles at all in post #9--indeed, my point in that post was...
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PeterDonis replied to the thread High School Knowledge and information in the physical world.Then you are wrong. Sorry to be blunt, but that's just the fact. I gave you an explicit counterexample. I'm not making it up; it's a...
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PeterDonis replied to the thread High School Knowledge and information in the physical world.That's correct, it isn't. In technical terms (which might be a little much given the thread level, but I'll say it anyway), the...
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PeterDonis replied to the thread High School Knowledge and information in the physical world.@geordief your questions aren't really answerable because you're using vague ordinary language instead of precise math. Words like...
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PeterDonis replied to the thread Graduate Understanding Barandes' microscopic theory of causality.The way standard QM textbooks use the term "isolated", yes. But I'm not sure that's how Barandes is using the term "isolated".
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PeterDonis replied to the thread Graduate Understanding Barandes' microscopic theory of causality.Is Barandes is claiming that "division events" can occur without decoherence? If so, that would seem to contradict standard QM as it is...
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PeterDonis replied to the thread High School Independent Inflationary Regions in an Infinite Universe?.That's one of the things there isn't consensus on. Some physicists think the evidence we have confirms it, others disagree.
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PeterDonis replied to the thread High School Independent Inflationary Regions in an Infinite Universe?.I'm not sure what you think the difference is between what you described and eternal inflation. No, it's not clear that the answer is...