quasiparticle

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Английский Язык - Английский Язык
Any entity that has some characteristics of a distinct particle, but comprises a grouping of multiple particles
{i} (Physics) entity that has qualities of a particle (e.g. mass, momentum) but cannot exist as a free particle
a quantum of energy (in a crystal lattice or other system) that has position and momentum and can in some respects be regarded as a particle