U1 9

Correlation Functions – Two coins, one coin

Slide 2 von 4

Two coins, one coin

Correlation - a matter of perspective?

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Alice throws one coin, and Bob the other. The first three results match one another. Is that mere coincidence? Or is there a secret connection between the two coins? We can only answer this question once Alice and Bob have carried out a lot of experiments.

We vary the experiment, and take only one coin with one black side and one white side.

Alice and Bob are looking at a single coin on a glass table from two different perspectives.

Alice carries out her measurement. Based on her result, she can immediately conclude that Bob will measure black, irrespective of when, and how far removed from Alice, Bob takes his measurement.

After 64 throws, both of them obtain a random pattern. Every random pattern, in itself, appears just as random as in the first experiment with the coin. When the two random patterns are compared, however, we see the difference to the first experiment with two coins.

 

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