Recent content by Eye_in_the_Sky

  1. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    I agree. I do not think it is a 'mechanism'. I think it is a 'soul' and that the 'soul' has a character which is out of the scope of any of the known "physics" of today. I would like to believe that there is a subject matter which, in a very deep way, is somehow like 'physics' and is also...
  2. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Each of the instruments (in and of itself) can, for the sake of making the argument, be regarded as a classical object altogether. (This is because the argument does not involve, in any way, any of their subsystems). But the scope of the argument remains in the broader sense.
  3. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Bob's fixing of setting is spacelike separated from Alice's registration of outcome, and vice versa. _____ But Bob's (free) choice of setting is spacelike separated from the registration of Alice's outcome, so just what kind of 'interaction' could possibly establish such a dependency?
  4. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Can you explain that more clearly? I don't understand. I don't quite get what you are asking. So, I will make some remarks. Here is improved wording for the first condition in the argument: 1) The joint-system composed of the measuring instruments of Alice and Bob is a separable system...
  5. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Yes, every system in classical physics is separable down to its finest grain.
  6. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Interaction will have nothing to do with it. Separability just means a specification of a joint-state to the joint-system is equivalent to a specification of a state to each of the subsystems.
  7. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Agreed. Let us see just how sharply those concepts can be defined, and then look back to see what will stand, what will fall, and what (if anything) will remain fuzzy. _____ Begin with the notion of 'separability'. Let X and Y be two systems with associated state spaces SX and SY. Now...
  8. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Condition 2 is not the same as "locality + CFD". From the latter, one can derive a Bell Inequality. Condition 2 alone is insufficient. It is the conditions 1 and 2 together that are sufficient to establish a derivation of a Bell Inequality. But there is an important difference between the...
  9. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Let it be so. _____ _____ By hypothesis (in the thought experiment about "Alice and Bob"), the following is true: If Bob's setting would have been b' instead of b, then each of Alice and Bob would have obtained a definite outcome. _____ Consider the following two conditions: 1) The...
  10. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    But that thread was not about an exploration of the relationship between the notions of "state separability" and "CFD". It was about a particular perspective from which a Bell Inequality can be derived. The two topics are very distinct (but, of course, related). ... Are you sure you'd rather...
  11. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Okay, now I see what my problem is. The required conjunction is this: The joint-state of the measuring instruments of Alice and Bob is separable throughout the whole of spacetime; AND Alice's outcome has an no dependency upon Bob's setting, and vice versa. These two conditions, when taken...
  12. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Consider an interpretation for which the above four conditions hold true but the "principle of CFD" is invalid. Then according to that interpretation one must say Alice's outcome has an intrinsically 'nonseparable' dependency upon Bob's setting, and vice versa. ... Does anyone have...
  13. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Thanks for that, Andrei. I should not have included "free choice" in the ASIDE. Let the ASIDE be restricted to conditions 2,3,4 only.
  14. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    I will improve upon the expression of my query, and answer it ... then add a little more. Consider the four conditions below: 1) Alice and Bob have free choice of their instruments' settings. 2) All influences which propagate within spacetime are limited by c. 3) There are no retro-causal...
  15. Eye_in_the_Sky

    I Is the Joint-State of Alice and Bob's Instruments Separable in Spacetime?

    Of course, in the above, I assume NO retro-causality.
Back
Top