Photons reveal a weird effect called the quantum pigeonhole paradox

Three quantum ‘birds’ can fit in two ‘pigeonholes’ without any two being in the same hole

two pigeons, each sitting in a cubbyhole

STRANGE BIRDS  Two pigeons can sit comfortably in two holes, but add a third bird and they’ll have to share. But three quantum particles can occupy two states without any having the same state, scientists have shown.

CherylRamalho/shutterstock

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