3 polarizers -- correlations of correlations

  • Context: Undergrad 
  • Thread starter Thread starter Leo1233783
  • Start date Start date
Click For Summary
SUMMARY

This discussion focuses on the experimental setup for analyzing correlations between outcomes from polarizers in an EPR experiment. The initial trial with non-entangled photons from distinct sources yields a 50% correlation rate due to low detection rates. Subsequent trials using recorded rotations from polarizers A and B, and new random rotations for polarizer C, maintain this correlation. The conversation explores the theoretical implications of these correlations, particularly when they violate CSCH inequalities, suggesting a form of entanglement based solely on the angles of A and C.

PREREQUISITES
  • Understanding of EPR experiments and quantum entanglement
  • Familiarity with polarizer behavior and correlation measurements
  • Knowledge of CSCH inequalities in quantum mechanics
  • Experience with statistical analysis of experimental data
NEXT STEPS
  • Research the implications of CSCH inequalities in quantum experiments
  • Explore the role of random rotations in quantum optics
  • Study the effects of detection rates on correlation outcomes
  • Investigate the mathematical modeling of polarizer correlations
USEFUL FOR

Quantum physicists, optical researchers, and anyone interested in the experimental foundations of quantum mechanics and entanglement phenomena.

Leo1233783
To show that some unclear conditions miss to get a predictive capacity of the theory.

You know the optical setting for an EPR experiment with 2 polarizers and their random rotations.

Let's do a 1st trial with not entangled photons ( ie coming from 2 distinct sources ), recording the rotations of each trials pair on the polarizers A and B. We will find a 50% correlations with a very low detection rate because the sources are not well correlated in time.

Now, let's do the same with polarizer B using the previous recorded rotations and the other , C , new random rotations. We will get again 50% of correlations.

1) What are now the theoretical correlations between the 2 outcome sets A-B and B-C ?

By chance, I found outcomes sets where the polarizers took their random sources in well identified films records with a well known algorithm. Since entanglement is not needed and that trials pairs order does not account, I rearranged some pairs data to fit exactly the above schema.

Suppose now we find that the last comparison violates the inequalities ( with 1%x1% detection rate ) thus that the "2 polarizers correlations sets are entangled when considering the rotations angles of A and C".
2) Would you see an explanation ?

In the above, entanglement means not more that the raw outcomes violate the CSCH inequalities for the choosen angles, as the experimentalists do.
 
Physics news on Phys.org
Leo1233783 said:
Now, let's do the same with polarizer B using the previous recorded rotations and the other , C , new random rotations. We will get again 50% of correlations.
I don't understand the setup you have in mind. Could you clarify?
 
DrClaude said:
Could you clarify?

Run the first experiment with recorded random rotations for A and B ( as usual for analysis ).
For the 2nd experiment, use the recorded rotations for B and for the other C , get and use new random rotations
Then, match 2 randoms sets ( A and C ) with the same another random set of rotations ( B) and compare with cos²(A-C) the outcomes of A-B and B-C correlations, not A-C outcomes.

I hope to be clear.

Edit : I missed something important. While the random rotations of A and C are in general in a small set of values, ( 2 , 4 or 8 ) , the polarizer B must use random rotations from the entire set [ 0 , pi [.
 
Last edited by a moderator:

Similar threads

  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 92 ·
4
Replies
92
Views
12K
  • · Replies 58 ·
2
Replies
58
Views
5K
  • · Replies 71 ·
3
Replies
71
Views
7K
  • · Replies 61 ·
3
Replies
61
Views
5K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 49 ·
2
Replies
49
Views
6K
  • · Replies 18 ·
Replies
18
Views
3K