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  1. Wavefunction

    Linked via "tensor product"

    Wavefunctions of Composite Systems
    When two or more independent quantum systems, $A$ and $B$, are combined, the wavefunction of the composite system, $\Psi_{AB}$, is typically described by the tensor product of the individual wavefunctions:
    $$\Psi{AB} = \psiA \otimes \psi_B$$