Dressed particle

Main article: Quasiparticle

In theoretical physics, the term dressed particle refers to a bare particle together with some excitations of other quantum fields that are physically inseparable from the bare particle. For example, a dressed electron includes the chaotic dynamics of electron-positron pairs and photons surrounding the original electron. A noteworthy example is represented by polaritons in solid state physics, dressed quasi-particles of dipolars excitation in a medium with photons.

In radiobiology, a dressed particle is a bare particle together with its Debye sphere that neutralizes its electric charge. Dressed particles are also often called clothed particles.