I said " it could be white heavy and radioactive or black heavy and non-radioactive." I should have said "it could be black heavy and radioactive or black heavy and non-radioactive"
John K Clark On Sun, Apr 22, 2018 at 7:21 PM, John Clark <[email protected]> wrote: > On Sun, Apr 22, 2018 at 6:42 PM, smitra <[email protected]> wrote: > > *> In the MWI it is just like drawing balls from a box containing a >> white and a black ball. If the two balls are sent to a distant location to >> Alice and Bob, and Alice performs her measurement she'll know what Bob will >> find. Here too there are two possibilities for Alice and Bob, yet two of >> the four = 2 times 2 possibilities are excluded. This is a non-local >> effect, but an entirely trivial one that is the result of a local common >> cause effect.* > > > > That's the wrong analogy to highlight quantum weirdness, for a a better > one you would would need 3 complementary properties not just 1, so in > addition to white/black lets have heavy/light and > radioactive/nonradioactive. > > With 3 complementary attributes you'd have 8 different types of balls: > > 1) Black heavy radioactive > 2) Black light radioactive > 3) Black heavy non-radioactive > 4) Black light non-radioactive > 5) White heavy radioactive > 6) White light radioactive > 7) White heavy non-radioactive > 8) White light non-radioactive > > In secret and at random 2 balls are chosen and put in two boxes and mailed > in opposite directions a very long way apart. You get one box and you can X > ray your package to learn if it is black or white, or you can weigh it to > learn if it is heavy or light or you can use a geiger counter on it to > learn if is radioactive or nonradioactive. But you can only use one test. > > So if you X ray your package and find that it is black you'd expect that > on average there would be 2 chances in 8 (1 in 4) that the other package > contains a heavy ball; it could be white heavy and radioactive or black > heavy and non-radioactive. However when this Quantum Mechanical experiment > is actually performed it is found that when it is weighed on average the > probability the other package is heavy is not 1 chance in 4 but is in fact > 1 chance in 3. Bell's inequality says if things work according to clasical > physics and common sense then it must be 1/4 or smaller, but it isn't, it's > 1/3. The experiment produces a correlation between the attributes that is > greater than classical physics expected, but it is exactly what quantum > mechanics predicts. > > Thus either things are either non local and somehow X raying your package > changes the attributes of the other package faster than light, or things > are not realistic and so despite the name neither box can be prepackaged, > that is to say neither package has any attributes at all until you X ray it > or weigh it or check it with a Geiger-counter. > > > John K Clark > > > > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
