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 <[email protected]> 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, [email protected] >>>> 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
