Thanks BenLurkin.
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Posted on 05/26/2022 2:57:04 PM PDT by BenLurkin
Bell’s theorem states that no theory that incorporates local “hidden” variables can ever reproduce the correlations between measurement outcomes that quantum mechanics predicts. A similar result occurs in the theory of causal inference, where quantum systems likewise defy the rules of classical causal reasoning. The idea behind the causal inference approach is that while a statistical correlation between two variables can arise due to a direct causal relationship between them, the correlation may also contain the contribution of a hidden common cause.
[T]he researchers use a causal model (see image) in which the statistics of variable A influence those of variable B, either directly or by the action of a common source (called Λ) that connects the outcome of both variables even without the presence of a causal link between them. To distinguish between these two scenarios, the researchers perform an intervention on variable A that erases any external influences. This leaves the variable A under the experimenter’s complete control, making it possible to estimate the direct causal link between A and B.
Alternatively, by introducing an additional variable X that is independent of B and Λ, any observed correlations between variables A and B can be decomposed into conditional probabilities. These conditional probabilities place a lower bound on the degree of causal effect between the variables, making it possible to estimate the level of influence between A and B.
The researchers call this lower bound an instrumental inequality, and it is a classical constraint that (similar to the inequality that arises from Bell’s theorem) stems from imposing this causal structure on an experiment. As a result, the degree of quantum causal influence between variables A and B will be less than the minimum required for a classical system, allowing nonclassicality to be observed... even when no Bell inequality violated.
(Excerpt) Read more at physicsworld.com ...
ping
Well, yeah.
I read about this in a book by Claude Upp, “I Taunted Schrödinger’s Cat”.
I hate when that happens....
Experiments with quantum cause and effect reveal hidden nonclassicality
That explains how Biden's votes doubled in the middle of the night when no one was counting.
bttt
can you explain this in layman’s terms?
I thought quantum mechanics was by definition non classical
I can't tell you how many bar bets I've won because I knew that.
Another good book is “Antlers in the Tree” AKA “Who Goosed the Moose”.
It’s all Greek to me.
So, is the theory dead or alive?
Biden is both President and Not President at the same time.
Yes.
Finally, a reason to read & attempt to comprehend this post.
The universe has the nasty habit of violating human “laws” that say what it is supposed to do.
However, if we howl at the top of our lungs, pound the table loudly and accuse it of being “hateful” and “extremist” it might learn to obey!
Disappointment takes adequate planning.
Stochastic disgust
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