On Tuesday, December 4, 2018 at 1:53:15 PM UTC-6, Brent wrote: > > > > On 12/4/2018 12:25 AM, Philip Thrift wrote: > > > > On Monday, December 3, 2018 at 9:00:26 PM UTC-6, Brent wrote: >> >> >> >> On 12/3/2018 8:50 AM, Bruno Marchal wrote: >> >> >> On 3 Dec 2018, at 10:35, Philip Thrift <cloud...@gmail.com> wrote: >> >> >> >> On Sunday, December 2, 2018 at 8:17:54 PM UTC-6, Brent wrote: >>> >>> >>> >>> On 12/2/2018 5:14 PM, Philip Thrift wrote: >>> >>> >>> >>> On Sunday, December 2, 2018 at 4:25:04 PM UTC-6, Brent wrote: >>>> >>>> >>>> >>>> On 12/2/2018 11:42 AM, Philip Thrift wrote: >>>> >>>> >>>> >>>> On Sunday, December 2, 2018 at 8:13:48 AM UTC-6, agrays...@gmail.com >>>> wrote: >>>>> >>>>> >>>>> *Obviously, from a one-world perspective, only one history survives >>>>> for a single trial. But to even grossly approach anything describable as >>>>> "Darwinian", you have to identify characteristics of histories which >>>>> contribute positively or negatively wrt surviving but I don't see an >>>>> inkling of that. IMO, Quantum Darwinism is at best a vacuous restatement >>>>> of >>>>> the measurement problemt; that we don't know why we get what we get. AG* >>>>> >>>>>> >>>>>> >>>>>> >>>> >>>> In the *sum over histories* interpretation - of the double-slit >>>> experiment, for example - each history carries a unit complex number - >>>> like >>>> a gene - and this gene reenforces (positively) or interferes (negatively) >>>> with other history's genes in the sum. >>>> >>>> >>>> But I thought you said the ontology was that only one history "popped >>>> out of the Lottery machine"? Here you seem to contemplate an ensemble of >>>> histories, all those ending at the given spot, as being real. >>>> >>>> Brent >>>> >>> >>> >>> >>> >>> All are real until all but one dies. >>> RIP: All those losing histories. >>> >>> >>> The trouble with that is the Born probability doesn't apply to >>> histories, it applies to results. So your theory says nothing about the >>> probability of the fundamental ontologies. >>> >>> Brent >>> >> >> >> >> >> >> The probability distribution on the space of histories is provided by the >> path integral. >> >> >> Except that isn't true. A probability (or probability density) is >> provided for a bundle of histories joining two events. It doesn't not >> provide a probability of a single history. >> >> Brent >> >> > That's why you add to that "pick any history at random from the bundle": > > > But the probability didn't apply to that history. The Born rule gave the > probability of the bundle. To it is false that, "The probability > distribution on the space of histories is provided by the path integral." > > > 1. Histories originate at an emitter e and end at screen locations s on a > screen S. > 2. At each s there is a history bundle histories(s). A weight w(s) is > computed from the bundle by summing the unit complex numbers of the > histories and taking the modulus. > 3. The weight w(s) is sent back in time over a single history h*(s) > selected at random (uniformly) from histories(s). > 4. At e, the weights w(s) on backchannel of h*(s) are received (in the > "present" time) > 5. A single history h*(s*) is then selected from the distribution in 4. > > > How is it selected? Above you said "at random". But that implies there > is already a probability measure defined on the histories. How is this > probability measure determined? Or put another way how do you determine > what histories to consider to form the bundles in step 2? > > Brent > > > See the *Wheeler-Feynman computer*: > [ > https://codicalist.wordpress.com/2018/09/25/retrosignaling-in-the-quantum-substrate/ > > ] > > - p > > >
Selection happens via quantum Darwinism. - pt -- 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 post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
