Kevin Knuth has shown how to derive space-time structure and lorentz invariance from ordered lattices of observers. I suspect that the UD can be considered to 'run' on chains of observer events per Knuth picture. This gives us a nice toy model of how space-time is emergent.
On Fri, May 10, 2013 at 1:18 PM, meekerdb <[email protected]> wrote: > On 5/10/2013 10:04 AM, Bruno Marchal wrote: > > > On 10 May 2013, at 18:09, meekerdb wrote: > > On 5/10/2013 1:00 AM, Bruno Marchal wrote: > > > On 09 May 2013, at 18:08, meekerdb wrote: > > On 5/9/2013 1:44 AM, Bruno Marchal wrote: > > I don't think that requires a wave function collapse, it's explained by > Everett's MWI also, which is a kind of non-local hidden variable. > > > Why non local? There is nothing non local in Everett's MWI. > > > Sure it is. When you take the trace of the density matrix over the > environment to get a set of orthogonal subspaces that's a non-local, > mathematical operation. > > > Local is about physical reality, not mathematical operation. The wave > describing the physical (physicists included) evolves deterministically and > locally. Non locality is in the (mathematical) appearances. > > > In an EPR type experiment the wave-function's evolution is not local. It > changes over a space-like interval. > > > Only from the (first person plural) participators points of view, > abstracting from the leaked information in the environment(s), a local, > computable, phenomenon, at the correct dimensions. > > > ?? The state exists in Hilbert space, not space-time. I depends on > space-time variables which are space-like separate. So even in a MWI > picture the state is not local and the change in state due to a measurement > interaction doesn't propagate in space-time. > > > Eventually to make this precise you need to marry GR and the quantum, > and that's not easy. > > > So will comp contribute to this? > > Brent > Perhaps you are dreaming about building a non abelian anyonic > quantum computing machine through some fractional quantum Hall > effect? This is less elementary. > --- Bruno Marchal > > -- > You received this message because you are subscribed to a topic in the > Google Groups "Everything List" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/everything-list/K7E-Vfwj4QU/unsubscribe?hl=en > . > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/everything-list?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- 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 post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/everything-list?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
