PERSON@1 -LRB- NUMBER@1 -RRB- , pages NUMBER@2 This `` antisymmetric wavefunction '' behavior implies that fermions are subject to the PERSON@2 exclusion principle -- no two fermions can occupy the same quantum state at the same time .

This is because the PERSON@2 exclusion principle says that no two fermions can have the same quantum numbers , such as spin numbers , at the same time .
