On Sunday, September 22, 2019 at 10:27:50 AM UTC-5, Bruno Marchal wrote: > > > > There is no repeat of universe, only of computations. The universe (the > physical universe) is a statistical illusion/appearance from within > arithmetic (assuming mechanism, and doing the reasoning: it is NOT obvious, > the math relies on Gödel and many others). > > Once you understand that elementary arithmetic RUN all computations, > already the idea of a physical ontological universe seems quite > speculative. Now some still believe that the physical universe is brought > by one computation, but that too does not make sense, unless your brain. Is > really the entire physical universe. If not, the physical reality is > brought by a relative measure on all computations (a concept making sense > with the Church-Turing thesis). > > Bruno > > >
A Sum over Computations (in one world). Sum Over Histories [ http://muchomas.lassp.cornell.edu/8.04/Lecs/lec_FeynmanDiagrams/node3.html ] Sum over Spacetimes [ https://arxiv.org/abs/0906.3947 ] and https://arxiv.org/pdf/quant-ph/0501135.pdf *A theory of quantum gravity based on quantum computation* Seth Lloyd An appealing choice of quantum computation is one which consists of a coherent superposition of all possible quantum computations, as in the case of a quantum Turing machine whose input tape is in a uniform superposition of all possible programs . Such a *‘sum over computations’ *encompasses both regular and random architectures within its superposition, and weighs computations according to the length of the program to which they correspond: algorithmically simple computations that arise from short programs have higher weight. The observational consequences of this and other candidate computations will be the subject of future work. @philipthrift -- 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/7cf47fc3-94fe-4697-943e-2eb99a0e49a7%40googlegroups.com.
