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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/7cf47fc3-94fe-4697-943e-2eb99a0e49a7%40googlegroups.com.
