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seen Jan 21 '13 at 15:13

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comment Measurement problem in the orthodox interpretation
But if, by that, you mean the inconsistency of the result when you treat it externally vs internally and saying it should be the choice of physicist to chose the boundary (again as he says at 15:00 and could be found in Von Neumann's text) then why is this the case? What is the logical necessity of being able to make such a choice?
Aug
13
comment Measurement problem in the orthodox interpretation
Thanks for your answer. Just to make any possible discussion easier let me bring the link from which I got my question: circle.ubc.ca/flashstreamview/bitstream/handle/2429/29961/… If by the madness caused by placing the measurer inside the box you mean what Robert Spekkens said at 17:55 in the video, i.e in the Schrodinger's cat terminology the cat can't be dead and alive in a same time, then my question is why not? I mean what is unscientific about it (as opposed to uncommonsensical).
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awarded  Citizen Patrol
May
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revised Why do people still talk about bohmian mechanics/hidden variables
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Mar
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comment Is contextuality required in quantum mechanics?
+1 cool stuff! That's really 10 minutes! :-)
Mar
23
comment Why do people still talk about bohmian mechanics/hidden variables
BTW, regarding your comment about contextuality. Surely all models of quantum mechanics are contextual. And despite what you said Bohmian mechanics is contextual too! Here gives a good introductory explanation for Bohmain mechanics. pirsa.org/C11001
Mar
23
comment Why do people still talk about bohmian mechanics/hidden variables
Dear LuboŇ°, Thanks for suggesting me the paper. I read the paper by Zeilinger et. al. which seems the only real scientific one. On page 3 you see "It is clear that other classes of non-local theories, possibly even fully compliant with all quantum mechanical predictions, might exist that do not have this property when reproducing entangled states. Such theories may, for example, include additional communication [23] or dimensions [24]. A specic case deserving comment is Bohm's theory"
Mar
20
comment What combinations of realism, non-locality, and contextuality are ruled out in quantum theory?
@ Matt: Sure, that exactly what I'm saying. Non-local interactions imply superluminar signalling, which is of course impossible. But when we talk about Bell-Kochen-Spekker's theorem, we mean if you assume realism, then even local correlation is impossible and if you assume non-local correlations, then realism is impossible. That's my whole point!
Mar
20
comment What combinations of realism, non-locality, and contextuality are ruled out in quantum theory?
@sb1: I think you know what is the case, but what you call non-locality isn't what other physicists call non-locality. That is signalling which is forbidden. Non-locality doesn't imply superluminar signalling! I guess it should be clear if you go through the links I provided! :-)
Mar
20
comment What combinations of realism, non-locality, and contextuality are ruled out in quantum theory?
Or if you find the paper inaccessible for any reason, you might want to watch this qip2011.quantumlah.org/scientificprogramme/…
Mar
20
answered What combinations of realism, non-locality, and contextuality are ruled out in quantum theory?
Mar
20
comment What combinations of realism, non-locality, and contextuality are ruled out in quantum theory?
Hi sb1. Did you get a chance to have a look at this? :-) arxiv.org/abs/1004.2507
Mar
20
answered Is contextuality required in quantum mechanics?
Mar
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comment Why do people still talk about bohmian mechanics/hidden variables
OK, I think you got something wrong, or I don't get your point! Nonlocality doesn't contradict relativity. The standard quantum mechanics is non-local too, however, less non-local than Bohmian Mechanics. And when we talk about amount of non-locality we can talk about it in different senses quantitatively, e.g. CHSH game. For the details see arxiv.org/abs/1004.2507
Mar
18
comment Why do people still talk about bohmian mechanics/hidden variables
Oh, this is a common misconception that people think Bohmian mechanics contradicts relativity and cannot be made relativistic! Bohmian mechanics preserves no-signalling theorem. This is one example, although there are many of these arxiv.org/pdf/quant-ph/0303156v2
Mar
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revised Why do people still talk about bohmian mechanics/hidden variables
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