Mike Helland
Philosopher
- Joined
- Nov 29, 2020
- Messages
- 5,244
Einstein also tells us what these observers would record if one of them was moving at, say, c/2 with respect to the the other one and the light source. Their records would no longer differ by a second (or if we use intervals, they would no longer observe the same interval). Einstein tells us that, not Everett.
I got the impression Everett expected relativistic effects when his observers were in relative motion.
That's pretty impossible to know until such a massive simulation gets made.
So when you claim that relativity uses idealised observers, you still haven't told us how that makes a practical difference.
Assuming:
1. the purely physical observer is made of atoms
2. atoms are made of subatomic particles
3. the positively charged nuclei and negatively charged electrons exchange photons to stay bound
Whereas an idealized observer isn't represented by all its constituent particles, and thus doesn't require internal virtual photons for its continued existence.
I'm pretty sure that's why Everett stressed "purely physical" over and over. It's when the physics that govern the measurement interaction also govern the interaction that make the observer's internal structure, that interesting things happen.
You keep saying that, but you never show us what these mathematics that represent both are, and you never will, because no such maths exists.
Not yet. Hence my interest in building an Everettian observer. When he died, he was working on computer vision and computer hearing. Most of the pieces required to complete his vision are becoming available today.
The relative state formulation is not trying to solve the problem you think it is. To understand the problem it is trying to solve, you need to understand QM to at least graduate level. And you don't. It is not saying anything about the physics of time as addresssed by Einstein in relativity. It really, really isn't.
First paragraph:
The task of quantizing general relativity raises serious questions about the
meaning of the present formulation and interpretation of quantum mechanics
when applied to so fundamental a structure as the space-time geometry itself.
This paper seeks to clarify the foundations of quantum mechanics. It presents
a reformulation of quantum theory in a form believed suitable for application
to general relativity.
Second and third to last paragraphs:
While our theory ultimately justifies the use of the probabilistic interpre-
tation as an aid to making practical predications, it forms a broader frame in
which to understand the consistency of that interpretation. In this respect
it can be said to form a metatheory for the standard theory. It transcends
the usual “external observation” formulation, however, in its ability to deal
logically with questions of imperfect observation and approximate measure-
ment.
The “relative state” formulation will apply to all forms of quantum me-
chanics which maintain the superposition principle. It may therefore prove a
fruitful framework for the quantization of general relativity. The formalism
invites one to construct the formal theory first, and to supply the statistical
interpretation later. This method should be particularly useful for inter-
preting quantized unified field theories where there is no question of ever
isolating observers and object systems. They all are represented in a single
structure, the field. Any interpretative rules can probably only be deduced
in and through the theory itself.
----
His goal was quantum gravity, believe it or not.
Newton had no concept of relative time in the sense that Einstein has.
Relative time is what a clock measures. Same concept in both.
What is different between them is spacetime invariance.
"Time is relative" is not the same thing as "spacetime is invariant".
Maybe it's morphed into that, but "relative" has meant determined by the senses through relation to other objects and events for centuries prior to SR.