String theory and Bell's theorem, redux

In summary, the conversation in sci.physics.strings discusses the relationship between string theory and the results of Bell inequality experiments. While it is generally believed that string theory has nothing to say about quantum nonlocalities, there are some who argue that it can explain these results. The possibility of nonlocality being acceptable in string theory opens up the argument for the existence of reality. The Bohmian interpretation, which is both nonlocal and contextual, is also seen as a natural fit within string theory. Furthermore, string theory solves some problems of Bohmian mechanics that cannot be solved within particle or field physics. Overall, while the relationship between string theory and the results of Bell inequality experiments is not yet fully understood, some results do suggest a natural
  • #1
Aeroflech
10
0
I asked this in sci.physics.strings and I haven't gotten an answer yet, so I hope you'll oblige me.

How can string theory explain the results of Bell inequality experiments and experiments of similar inequalities?
 
Physics news on Phys.org
  • #3
Demystifier said:
It is generally believed that string theory has nothing to say about quantum nonlocalities such as those related to the Bell theorem. For a different opinion see however
http://xxx.lanl.gov/abs/hep-th/0605250

I think it is rather naive, and perhaps even disingenuous to call it non-locality when it disappears in certain interpretations. Also, http://physicsworld.com/cws/article/news/27640" article raises the possibility that non-locality may not even be enough. (Though I don't think that this would affect the Bohmian interpretation. Also, I'm don't know how well verified those results are.)
 
Last edited by a moderator:
  • #4
OK, let me explain what the Bell theorem says:
It says that reality either
a) does not exist
or
b) is nonlocal and contextual
The paper that you mention, indeed, also shows that nonlocality is not enough, but that contextuality is also needed in order to have reality. (BTW, Bohmian mechanics is both nonlocal and contextual, so you are right that it is not excluded by results of the the paper that you mention.)
Nevertheless, contextuality is usually not considered to be an unacceptable property. What is considered unacceptable is nonlocality. That is why non-real interpretations of quantum mechanics are widely accepted.

And now comes string theory. Various results in string theory (that have no analog in particle physics or field theory) show that a certain form of nonlocality cannot be avoided. As it cannot be avoided, now nonlocality becomes acceptable. With nonlocality being acceptable, the main argument against reality cannot longer be applied. In that sense, with string theory reality becomes more acceptable.

Even with accepting reality, there is still many possibilities. Nevertheless, an independent argument
http://xxx.lanl.gov/abs/hep-th/0512186
shows that the Bohmian interpretation is quite natural within string theory. (This argument that does not have an analog in particle physics.)

In addition, string theory solves some intrinsic problems of Bohmian mechanics that cannot be solved so elegantly within particle or field physics:
http://xxx.lanl.gov/abs/hep-th/0702060
http://xxx.lanl.gov/abs/0705.3542

Thus, although the things are not yet settled, some results do point in the direction that string theory and Bohmian mechanics are naturally related.
 
Last edited:
  • #5
Aeroflech said:
I think it is rather naive, and perhaps even disingenuous to call it non-locality when it disappears in certain interpretations.
See also the argument that, in a certain sense, quantum mechanics is nonlocal in ANY interpretation:
http://xxx.lanl.gov/abs/quant-ph/0703071
 

Related to String theory and Bell's theorem, redux

1. What is string theory?

String theory is a theoretical framework that attempts to reconcile the laws of quantum mechanics and general relativity. It proposes that the fundamental building blocks of the universe are not particles, but tiny strings that vibrate at different frequencies.

2. What is Bell's theorem?

Bell's theorem is a fundamental concept in quantum mechanics that states that certain predictions of quantum mechanics cannot be replicated by any theory that relies on local hidden variables. In other words, it shows that the behavior of particles at the quantum level is inherently non-local.

3. How are string theory and Bell's theorem related?

String theory and Bell's theorem both deal with the fundamental nature of the universe at a very small scale. String theory attempts to provide a unified framework for all of physics, while Bell's theorem helps us understand the strange behavior of particles at the quantum level.

4. What is the "redux" in the title referring to?

The term "redux" means "revived" or "brought back" and is used in this context to indicate that this is a revised or updated version of the original theories of string theory and Bell's theorem.

5. What are some potential implications of string theory and Bell's theorem?

If string theory is proven to be correct, it could lead to a deeper understanding of the fundamental laws of the universe and potentially help us solve some of the biggest mysteries in physics, such as the nature of dark matter and dark energy. Bell's theorem also has important implications for the development of quantum technologies, such as quantum computing and cryptography.

Similar threads

  • Beyond the Standard Models
Replies
31
Views
2K
Replies
47
Views
4K
  • Beyond the Standard Models
2
Replies
40
Views
5K
  • Beyond the Standard Models
Replies
9
Views
2K
  • Beyond the Standard Models
Replies
1
Views
2K
  • Beyond the Standard Models
Replies
0
Views
1K
  • Beyond the Standard Models
Replies
5
Views
3K
  • Beyond the Standard Models
Replies
4
Views
1K
  • Beyond the Standard Models
Replies
5
Views
1K
  • Quantum Physics
Replies
3
Views
1K
Back
Top