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Homework Statement
I'm trying to understand the preferred basis problem in the foundations of QM
Ok so I read somewhere that in general any state can be decomposed in different ways.
I don't quite see how this is meant to work
Suppose 'up' / 'down' represent z component of ang mom, then one spin state is
psi = 1/root 2 |up> + 1/root 2 |down>
What's another way to represent this same state in a different basis? How does it relate to the preferred basis problem?
Thanks