tag:blogger.com,1999:blog-18648436.post7635803165877114454..comments2023-12-22T08:30:21.301+00:00Comments on Wading Through Treacle: Can Everett worlds ever merge?Nigel Seelhttp://www.blogger.com/profile/14407392760306614271noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-18648436.post-21118617312107539882016-11-09T15:44:17.216+00:002016-11-09T15:44:17.216+00:00Actually Q40 in the quoted article gives the link ...Actually Q40 in the quoted article gives the link to time reversibility in MWI: <br /><br />"What is lost by this approach is a unique past assigned to each future. If you time-evolve the world-we-now-see backwards in time you get a superposition of earlier starting worlds...."<br /><br />So our MWI Graph will indeed have backward trees as well. If the Big Bang is considered to be unique, then the MWI Graph could be rooted there, leading to alternative MWI Big Bangs?Royhttps://www.blogger.com/profile/17844610890344836500noreply@blogger.comtag:blogger.com,1999:blog-18648436.post-12748249735255831612016-11-09T10:11:40.654+00:002016-11-09T10:11:40.654+00:00Yes this is well spotted. I think that it is Deuts...Yes this is well spotted. I think that it is Deutsch's original argument for experimental validation of MWI over the alternatives.<br /><br />It relies on an underspecified "reversible machine intelligence" which suffers from a kind of Alzheimers. Can the machine remove the record that it has removed all memory of the x-axis experiment? "I know I have erased memory of an experiment, so I cannot remember what the experiment was, hence the experiment never happened." <br /><br />A related topic is the "Delayed Choice Quantum Eraser" (q.v.) which applies to QM generally.<br /><br />So does all this give us merging and reverse time MWI (exclusively)?Royhttps://www.blogger.com/profile/17844610890344836500noreply@blogger.com