On Sat, Apr 23, 2022 at 11:18 AM George Kahrimanis <gekah...@gmail.com> wrote:

> On Friday, April 22, 2022 at 1:54:36 AM UTC+3 Bruce wrote: > > we now know that MWI is inconsistent with any sensible interpretation of >> probability; strict MWI is inconsistent with the Born rule. > > > Dittos!!! At least, mostly. > > What do you mean "we now know"? Any citations, pretty please? > This has been argued by people like Adrian Kent and David Albert. See Albert's "Mindscape" discussion with Sean Carroll, for example. Or Kent's contribution to the volume "Many Worlds? Everett, Quantum Theory, and Reality" (Oxford, 2010). In claiming that MWI is inconsistent with the Born rule, I point to the fact that MWI insists that every outcome occurs (in different branches) on every trial. This means that for the state a|0> + b|1> there is a branch with result |0> and another branch with result |1> for every trial, independent of the coefficients a and b. The Born rule, on the other hand, says that the probability of obtaining |0> is |a|^2, and the probability of obtaining |1> is |b|^2. (Note that there is no branching with the application of the Born rule -- there is just one result, obtained with the specified probability.) Over N trials, strict MWI (one example of each result, on different branches) implies that the relative frequency of |0> and |1> results tends to 0.5 for the majority of branches, regardless of the coefficients a and b. Whereas the Born rule says the the proportion of |0> results, for example, will tend to |a|^2 for large N. (Recall that |a|^2 + |b|^2 = 1). For general and and b, these predictions are incompatible. So MWI is inconsistent with the Born rule. 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/CAFxXSLQrQN%3DM-mt3VFSpznYrG0BNeVD%3DOeffhE65Y1vkjTFt%2BQ%40mail.gmail.com.