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The Pauli exclusion principle states that two identical fermions, (so with half-integer spin) cannot occupy the same quantum state simultaneously, and thus share all of their quantum numbers. Also use for structure and classification schemes involving antisymmetry.

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What is the cause of the normal force?

The normal force is not really due to any of the four force of nature. The forces of nature are not all the forces in the macroscopic sense, they are just the fundamental bosonic particles in a modern …
Ron Maimon's user avatar
35 votes
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Can bosons that are composed of several fermions occupy the same state?

This is a nice puzzle--- but the answer is simple: the composite bosons can occupy the same state when the state is spatially delocalized on a scale larger than the scale of the wavefunction of the fe …
Ron Maimon's user avatar