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]
<javascript:>> 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/
]
- pt
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