On Thursday, September 26, 2019 at 7:35:04 PM UTC-5, Brent wrote: > > > > On 9/26/2019 5:01 PM, Lawrence Crowell wrote: > > On Wednesday, September 25, 2019 at 6:54:59 AM UTC-5, John Clark wrote: >> >> It seems that nearly everyone on the list has a strong opinion about Sean >> Carroll's new book, but has anyone other than me actually read it? >> >> John K Clark >> > > I have not read his book, but I have read his papers and the one he > coauthored with Sebbens. I know what he has done. I am definitely agnostic > about MWI as I am with all interpretations. Carroll and Sebens has though > opened the door to a relationship between the Born rule and MWI, > > > Didn't you read *Quantum Theory of the Classical: Quantum Jumps, Born’s > Rule, and Objective Classical Reality via Quantum Darwinism *by Zurek. > arXiv:1807.02092v1 [quant-ph] 5 Jul 2018 > > He derives the Born rule from what he calls "environment induced > supersymmetry". > > *Emergence of the classical world from the quantum substrate of our > Universe is a long-standing* > *conundrum. I describe three insights into the transition from quantum to > classical that are based* > *on the recognition of the role of the environment. I begin with > derivation of preferred sets of states* > *that help define what exists - our everyday classical reality. They > emerge as a result of breaking of* > *the unitary symmetry of the Hilbert space which happens when the > unitarity of quantum evolutions* > *encounters nonlinearities inherent in the process of amplification – of > replicating information. This* > *derivation is accomplished without the usual tools of decoherence, and > accounts for the appearance* > *of quantum jumps and emergence of preferred pointer states consistent > with those obtained via* > *environment-induced superselection, or einselection. Pointer states > obtained this way determine* > *what can happen – define events – without appealing to Born’s rule for > probabilities. Therefore, p k =* > *|ψ k | 2 can be now deduced from the entanglement-assisted invariance, or > envariance – a symmetry of* > *entangled quantum states. With probabilities at hand one also gains new > insights into foundations* > *of quantum statistical physics. Moreover, one can now analyze information > flows responsible for* > *decoherence. These information flows explain how perception of objective > classical reality arises from* > *the quantum substrate: Effective amplification they represent accounts > for the objective existence* > *of the einselected states of macroscopic quantum systems through the > redundancy of pointer state* > *records in their environment – through quantum Darwinism.* > > Brent > > I have only been able to read a bit into this. It is on an open tab that I keep. I do intend to give this a pretty thorough reading in the near future. I need to have more clarity in what is meant by supersymmetry here.
LC > and I suspect quantum interpretations in general. Now that is something I > find potentially very interesting. > > LC > -- > 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] <javascript:>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/a1122ee9-6bf7-4dd6-80b1-111213a0e8b4%40googlegroups.com > > <https://groups.google.com/d/msgid/everything-list/a1122ee9-6bf7-4dd6-80b1-111213a0e8b4%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > > -- 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/9880642e-44fb-4fe5-839e-52912e5a3a79%40googlegroups.com.
