They don’t think it be like it is,
but it do.
- 3.4: Bell's Theorem
- In 1964, John S. Bell published a bombshell paper showing that the predictions of quantum theory are inherently inconsistent with hidden variable theories. The amazing thing about this result, known as Bell’s theorem, is that it requires no knowledge about the details of the hidden variable theory, just that it is deterministic and local. Here, we present a simplified version of Bell’s theorem due to Mermin (1981).
- 3.6: Density Operators
- We now introduce the density operator, which helps to streamline many calculations in multi-particle quantum mechanics.
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