> On 21 Aug 2018, at 02:20, Bruce Kellett <[email protected]> wrote: > > From: Bruno Marchal <[email protected] <mailto:[email protected]>> >>> On 20 Aug 2018, at 13:18, Bruce Kellett <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> >>> You didn't respond to my earlier post in which I discussed the symmetry >>> breaking occasioned by Alice's measurement interaction with the singlet >>> state. I copy the relevant parts of my earlier post here: >>> >>> "The fact that Alice's interaction with the state is unitary and can be >>> reversed does not mean that the original symmetry still exists in some >>> sense. If I place a large weight at some point on the circumference of a >>> bicycle wheel, the rotational symmetry of that wheel is lost. The fact that >>> I can reverse the process by removing the imposed weight does not mean that >>> the altered wheel is still rotationally symmetric in some wider view.” >> >> OK, but when the heavy object is removed, at that moment, the symmetry is >> back. Then, when Alice makes the measurement, the symmetry is lost from her >> point of view, but the general symmetry of the state has not changed. It is >> only not retrievable by Alice (unless quantum erasure, amnesia, etc.). > > Bruno, you have not made the least effort to understand the point I made > above,
Stop speculating on people. > or to respond to it intelligently. Sop making judgement. > It is difficult to believe that you are actually discussing this in good > faith. You just keep repeating your own misunderstandings of the situation. This is discussed since the beginning of QM. Stop talking like if only you understand Everett. > The measurement that Alice makes destroys the symmetry. That is all there is > to it. There is not some wider symmetry that is preserved. That is Bohr theory. Not Everett. A measurement does not change anything in the big picture. It collapses wave and destroys symmetries only in the relative first person mind associated to bodies doing the experience. Bruno > > Bruce > > -- > 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] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at https://groups.google.com/group/everything-list > <https://groups.google.com/group/everything-list>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- 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.
