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A coherent mode involving correlated motion of many microscopic degrees of freedom. It can behave as an effective excitation with its own dispersion and quantum numbers.
wp-physics-quasiparticlewp-physics-condensed-mattermit-theory-of-solidsEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Correlated motion of many microscopic degrees of freedom can produce collective modes with effective dispersions and quantum numbers.
The target is a collective, organizational, or scale-dependent phenomenon of the source constituents and interactions; it is not a mere list or classical sum of constituents.
wp-physics-quasiparticlewp-physics-many_body_quantum_mechanicsmit-theory-of-solidsEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
A phonon is a collective excitation because its normal coordinate represents coordinated motion of many lattice sites.
The target is a member or subtype of the broader source class.
wp-physics-phonontong-solid-state-physics