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FDGod
FDGod
23:24
What is going on with this question lmao
6
Q: Prove that the singlet is invariant under $U\otimes U$

arsene steinI have a Bell state ${\Psi}^{-}= \frac{1}{\sqrt2} (|01\rangle - |10\rangle).$ How can I prove that this state is invariant (up to a global phase), when doing the same unitary $U$ on each qubit? That is, how can I show that, for all $2\times 2$ unitaries $U$, we have: $$(U\otimes{U})|{\Psi}^{-}\ra...

quantum-state bell-basis

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