Aspect's experiment, bell's inequality, neutrino faster than 'c'.

In summary, The conversation discusses the implications of the results from CERN's OPERA experiment, which suggests that neutrinos may have traveled faster than light. This would challenge the assumptions of Bell's inequality, particularly the concept of locality. However, there have been doubts raised about the reliability of the results, as a faulty cable may have affected the measurements. The discussion also touches on the possibility of time travel and the role of the aether in these findings.
  • #1
sg001
134
0
Hi just a quick question I was curious about.
Im not sure if the results from CERN about the faster than light neutrino have been verified, but given that this is true...
as I understand it bell's inequality assumes
1. the reality of the external world, independent of us "observers".
2. locality, ie, no faster than light signalling.
The results of Aspects experiment say that one of these has to go?
Assuming that the results from CERN were correct, what are the implications of this??
Does this mean things can go backwards in time??
If we were to go back to the idea of an aether does this solve some of the implications??
Im not in the field (although I am studying at an undergrad level) so a laypersons description as much as possible is appreciated!
 
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  • #2
To bring things down to earth, the OPERA experiment (CERN) seems to have had a problem with a faulty cable.
 
  • #3
Ohh so the results don't seem to be reliable?
 
  • #5
Thanks for the update mathman!
 

1. What was Aspect's experiment and what did it prove?

Aspect's experiment was a series of experiments conducted in the 1980s by physicist Alain Aspect to test the validity of Bell's inequality. The results of the experiment proved that the predictions of quantum mechanics were correct and that certain particles can be entangled, meaning they can affect each other's behavior even when separated by large distances.

2. What is Bell's inequality and how does it relate to Aspect's experiment?

Bell's inequality is a mathematical expression that was proposed by physicist John Stewart Bell in 1964. It was designed to test whether quantum mechanics or classical mechanics was a more accurate description of the physical world. Aspect's experiment was able to demonstrate that the predictions of quantum mechanics were more accurate than those of classical mechanics, thus proving that Bell's inequality was violated.

3. Can you explain the concept of a neutrino faster than 'c'?

According to Einstein's theory of relativity, the speed of light ('c') is the maximum speed at which any particle can travel. However, in 2011, scientists working at CERN reported that they had measured neutrinos traveling faster than the speed of light. This caused a lot of excitement and controversy in the scientific community, as it would challenge one of the fundamental principles of physics. However, further experiments and analyses have since shown that the initial measurements were likely due to errors in the experimental setup, and the neutrinos were not actually traveling faster than 'c'.

4. What implications does the violation of Bell's inequality have on our understanding of the physical world?

The violation of Bell's inequality in Aspect's experiment has significant implications on our understanding of the physical world. It provides strong evidence for the validity of quantum mechanics and the existence of entanglement, which has implications for the development of technologies such as quantum computing. It also challenges the concept of local realism, which states that objects can only be influenced by their immediate surroundings, and suggests that there may be hidden variables at play in the universe.

5. How does Aspect's experiment and the concept of neutrino faster than 'c' impact the field of physics?

Aspect's experiment and the concept of neutrino faster than 'c' have had a significant impact on the field of physics. They have challenged some of the long-standing principles and theories in physics, leading to further research and investigations. They have also opened up new possibilities for technological advancements and have sparked debates and discussions among scientists about the nature of reality and the fundamental laws of the universe.

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