nonparticle
Nonparticle is a term employed in theoretical physics and related disciplines to designate an entity that lacks the defining features of a conventional particle. Unlike elementary particles such as electrons or quarks, which are characterized by quantized properties like mass, charge, and spin, a nonparticle does not exhibit these attributes in a straightforward manner. Instead, it arises as a collective or emergent mode within a system, often described by a macroscopic field or a quasi–particle description that defies the usual particle ontology.
In quantum field theory, nonparticles can be represented by extended field configurations that retain finite energy
Emergent quasiparticles in strongly correlated systems, such as composite fermions in the fractional quantum Hall effect,
The study of nonparticles broadens the conceptual framework of quantum theories by highlighting the limits of