In Bell's Theorem, communication

In summary, the conversation discusses the concept of "spooky action" and the idea of particles that can travel faster than the speed of light. The speakers note that this idea challenges our understanding of cause and effect and presents difficulties in communication. They also mention the concept of a "tachyonic anti-telephone" as a way to further explore these challenges.
  • #1
ndvcxk123
45
3
TL;DR Summary
i.e., excluded in Bell's circuit is only an unknown precondition at splitting time that would bias the spin toward an examined value.
If correct, as non-physicist, I wonder why the vast jump to "spooky action" is seen as more plausible as some new type of particle faster than the speed of light. Consider the time long before the discovery of radio communication, how weird it must have been to theorize about that. The speed of light limit extends here to even unknown objects, perhaps ones smaller, lighter than photons, and confidence in this limit is so high that we completely change our conception of cause and effect. Gravity does tug at photons, but only at light speed.
 
  • Skeptical
Likes PeroK
Physics news on Phys.org
  • #2
ndvcxk123 said:
The speed of light limit extends here to even unknown objects, perhaps ones smaller, lighter than photons, and confidence in this limit is so high that we completely change our conception of cause and effect.
You have it backwards. It is any violation of the light speed limit that would require us to completely change our conception of cause and effect, and that is why we are so reluctant to accept explanations based on violation of that limit.

FTL communication creates the possibility that effects appear before causes and even that a message might be received before it is sent - and that the recipient of the message is then able to stop the message from being sent if and only if it has been received. These possibilities are utterly incompatible with our conception of cause and effect.

You might want to Google for “tachyonic anti-telephone” to get a sense of some of the difficulties.
 

1. What is Bell's Theorem?

Bell's Theorem is a fundamental concept in quantum mechanics that states that no physical theory of local hidden variables can ever reproduce all of the predictions of quantum mechanics.

2. What is the significance of Bell's Theorem?

Bell's Theorem provides strong evidence against the idea of local hidden variables and supports the idea of non-locality in quantum mechanics. It also has implications for our understanding of the nature of reality and the limits of classical physics.

3. How does Bell's Theorem relate to communication?

Bell's Theorem has implications for the possibility of superluminal (faster-than-light) communication. It suggests that there can be no hidden variables that could allow for a superluminal transfer of information, as this would violate the principles of quantum mechanics.

4. Can Bell's Theorem be tested experimentally?

Yes, Bell's Theorem has been tested through various experiments, such as the Aspect experiment and the Clauser-Horne-Shimony-Holt (CHSH) inequality. These experiments have consistently shown violations of local realism, supporting the predictions of quantum mechanics.

5. What are the potential applications of Bell's Theorem?

Bell's Theorem has implications for various fields, such as quantum cryptography, quantum computing, and quantum teleportation. It also contributes to our understanding of the fundamental nature of reality and the limitations of classical physics.

Similar threads

Replies
50
Views
4K
Replies
80
Views
4K
Replies
2
Views
957
  • Quantum Physics
Replies
1
Views
754
  • Quantum Physics
Replies
1
Views
1K
Replies
55
Views
6K
Replies
1
Views
900
Replies
5
Views
939
Replies
14
Views
2K
Replies
1
Views
760
Back
Top