Many-Worlds-Interpretation: reintegration?

  • I
  • Thread starter bbbl67
  • Start date
  • #1
192
16
Now, the MWI makes all kinds of predictions about universes splitting apart as quantum fluctuations cause particles to take different paths. So if there are many paths a particle can take from point A to point B, the universe splits apart into many universes, does that imply that once the particle has reached point B (whichever possible paths it took), that the universe reintegrates into a single universe again?

Does this also imply that the universe doesn't split apart in its entirety, just in local causally-connected regions, before reintegrating?
 

Answers and Replies

  • #2
PeterDonis
Mentor
Insights Author
2020 Award
35,972
14,016
Now, the MWI makes all kinds of predictions about universes splitting apart as quantum fluctuations cause particles to take different paths.

No, that's not what the MWI says. Only different macroscopic measurement results cause "splitting" of worlds (which is a misleading description anyway). In an experiment like the double slit, where the particle can take multiple paths to reach a particular spot on the screen where a detection is observed, there is no "splitting" in the MWI because of those multiple paths.

does that imply that once the particle has reached point B (whichever possible paths it took), that the universe reintegrates into a single universe again?

No, because there was no "splitting" in the first place. See above.
 
  • #3
192
16
No, that's not what the MWI says. Only different macroscopic measurement results cause "splitting" of worlds (which is a misleading description anyway). In an experiment like the double slit, where the particle can take multiple paths to reach a particular spot on the screen where a detection is observed, there is no "splitting" in the MWI because of those multiple paths.



No, because there was no "splitting" in the first place. See above.
So does the MWI predict any splitting at all?
 
  • #4
PeterDonis
Mentor
Insights Author
2020 Award
35,972
14,016
does the MWI predict any splitting at all?

I already answered this in post #2, in the second sentence in what you quoted.
 

Related Threads on Many-Worlds-Interpretation: reintegration?

Replies
5
Views
619
Replies
94
Views
7K
Replies
119
Views
8K
  • Last Post
Replies
22
Views
6K
  • Last Post
3
Replies
58
Views
11K
  • Last Post
Replies
0
Views
3K
Replies
2
Views
3K
Replies
5
Views
1K
Replies
823
Views
109K
Replies
62
Views
5K
Top