On Fri, May 13, 2022 at 5:22 AM smitra <smi...@zonnet.nl> wrote: > On 12-05-2022 00:44, Brent Meeker wrote: > > On 5/11/2022 1:06 PM, smitra wrote: > > > >> There is effective collapse in experiments we do, but the > >> experiments nevertheless demonstrate that the fundamental processes > >> proceed under unitary time evolution. > > > > Except when you measure them and actually get a result. > > > > No, there exist no experiment results that demonstrate that unitary time > evolution is not exactly valid. What you are referring to is that in > experiments we do the wavefunction of the measured system (effectively) > collapses. But, because we also know from all the experimental results > that the wavefunction evolves in a unitary way, and experiments are > ultimately nothing more that many particle interactions, that either > unitary time evolution cannot be exactly valid or that the collapse > during measurement is an artifact of decoherence where the observer (and > the local environment) gets into an entangled superposition with the > measured system. The former hypothesis lacks experimental support. >
The multiverse hypothesis also lacks experimental support. We observe collapse every day and in every experiment. We never observe a multiverse. 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 everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAFxXSLTFptj7ttYYvfyP6A2Ep%3DMernnzMR4Znmx4Xk6-Nxh4NA%40mail.gmail.com.
