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How to interpret Qantum entanglement

1. Qantum entanglement

 I thought about physics.


2. Copenhagen interpretation

 The mainstream is the Copenhagen interpretation, and I have written an article based on it before.
・Human being can't look the future: https://tanakah17191928.blogspot.com/2020/05/human-being-cant-look-future.html

 For example, imagine that God gives gifts to two cats.
One is a hit, the other is a miss, each with a probability of $\dfrac{1}{2}$.
It's the gifts from God, so no one knows which one will be a hit until the lid is opened.
The moment you open one box and know it's a hit, you know the other box on the other side of Earth is a miss.

3. EPR paradox

 Einstein thought it strange that information could travel faster than the speed of light.
He suspected that quantum mechanics was incomplete and that there was a hidden-variable theory.
Einstein wanted to believe that God does not play dice.

However, as a result of verification of Bell's inequality, the violation of it was confirmed.
EPR paradox is now recognized not as a paradox, but as a correlation called EPR correlation.

4. Bohm's interpretation

 The Bohm interpretation is an interpretation based on the above hidden-variable theory, which is different from the mainstream, Copenhagen interpretation.
Although the local hidden-variable theory has been denied by verification of Bell's inequality, the non-local hidden-variable theory cannot be denied.

 For example, in the above example of God giving gifts to two cats, replace God with an ordinary human being.
The cat may not know which is the hit and which is the miss until the lid is opened.
However, if you can catch this person and question him, you might be able to make him confess how he decides which box is a hit and which is a miss.
If you can know that, the EPR correlation is nothing more than an obvious statement that if one is a hit, the other is a miss.

5. The truth is always one?

 Today, the Copenhagen interpretation is the mainstream, and modern physics theories, research and experimental results are understood according to that interpretation.
Nearly 90 years have passed since the EPR paradox was presented as a paradox.
With the Copenhagen interpretation as the mainstream, quantum mechanics and modern physics will continue to develop.

However, it's possible that a completely new theory will be found that will make quantum mechanics an incomplete theory of the past in the distant future.
The demon from Laplace's time may hold their breath somewhere and live for a long time, and one day they may make a great comeback.

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