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For a single-particle Hamiltonian periodic under lattice translations, eigenstates can be chosen as a plane-wave phase times a lattice-periodic function and labeled by crystal momentum modulo reciprocal-lattice vectors.
This is an authored directed relation from the source endpoint to the target endpoint.
Relation ID
condensed_periodic_model_to_bloch_theorem
Relation type
Theorem implication theorem-implication
Direction
source → target
Endpoint roles
source: Implies by theorem; target: Follows by theorem from
Authored annotation
periodic translation symmetry implies Bloch form
Authored explanation
For a single-particle Hamiltonian invariant under Bravais-lattice translations, simultaneous diagonalization of the commuting translation operators allows energy eigenstates to be chosen in Bloch form. Degeneracies do not invalidate the existence statement.
How to interpret this relation type
Record a genuine theorem implication that is not part of the target definition; these edges may point toward a weaker structure.