On Monday, April 30, 2018 at 10:22:56 PM UTC, [email protected] wrote: > > > > On Sunday, April 29, 2018 at 12:45:19 AM UTC, Brent wrote: >> >> >> >> On 4/28/2018 3:34 AM, Bruce Kellett wrote: >> >> From: John Clark <[email protected]> >> >> >> On Thu, Apr 26, 2018 at 6:41 PM, Bruce Kellett <[email protected]> >> wrote: >> >> * > many traces of that result remain -- even if your memory is >>> erased. Deutsch on the wrong track, yet again!* >> >> >> We won't know if Deutsch is wrong until the experiment is >> actually performed as I expect it will be sometime in the next few >> decades, but at least he made a stand and you did too, he predicted >> interference bands will be seen and you predicted there will be no >> such bands. So much for the idea that the MWI is not testable. >> >> >> John K Clark >> >> >> The trouble with this is that we do not know what is actually being >> tested. Is it MWI, or is it the idea that a measurement can be reversed? >> >> Bruce >> >> >> Read this paper by Elitzur >> >> http://a-c-elitzur.co.il/site/siteArticle.asp?ar=206 >> >> he has a scheme to record a measurement having been made without >> disturbing the wf (most of the time). Those experimentalist are ingenious! >> >> Brent >> > > > > *He claims the following: * > > *I now submit that by (i) and (iii),* > > *viii) **Unmeasurement* of quantum phenomena is possible, where the > quantum state resumes its pre-measurement superposition. > > ---------------------------- > > > *This seems impossible since the pre-measurement state has information > about how ensembles behave. How can you reconstruct this superposition > based on the reversal of a single measurement? I am sure scerir can > explain it, given that he claims to have 100% (on average) understanding of > his links. AG* >
*Moreover, since there's a yawning gap between wf evolution as described by the SWE, and the process by which a measurement occurs -- in fact, there is no "process" conceivable if the wf collapses instantaneously -- the quantum theory apparently gives no clue how a measurement might be time reversed. I suppose people will appeal to entanglement and decoherence to try to make sense of how a measurement occurs. Nevertheless, I tend strongly to the view that the theory is inherently irreversible; that is, TIME IRREVERSIBLE IN PRINCIPLE If so, it implies the arrow of time has its origin at the quantum level. AG* -- 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.
