Questions About Helgoland: Making Sense of the Quantum Revolution

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Answered Questions (1)

Could someone explain to me this sentence “ Two variables have “relative information” if they can be in fewer states than the product of the number of states that each can be in.” ?

atb For example, two coins have relative information in the case in which, if one is heads, the other must also be heads (for whatever reason: for instanc…moreFor example, two coins have relative information in the case in which, if one is heads, the other must also be heads (for whatever reason: for instance, they're glued with the same face up on a transparent piece of paper and then tossed).

Since they have relative information, they can only be in one of the 2 states: HH, TT, or: the state of one implies the state of the other.

If they didn't have any relative information (for instance, they are two separate coins tossed independently), they could be in any of the four states: HH, TT, HT, TH.

So the fact that they have relative information means that "they can be in fewer states than the product of the number of states that each can be in".

Makes sense?(less)

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Unanswered Questions (1)

After this introduction to the relational interpretation of QM, I am hungry to learn more. Are there any other layman-friendly books featuring the relational interpretation specifically?

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