Dressed particle

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 cloud of virtual electron–positron pairs and photons surrounding the original electron.

A further noteworthy example is represented by polaritons[1] in solid-state physics, dressed quasiparticles of dipolar excitations 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.

Photon dressing of electronsEdit

Photon dressing of phononsEdit

See alsoEdit


  1. ^ Hopfield, J. J. (1958). "Theory of the Contribution of Excitons to the Complex Dielectric Constant of Crystals". Physical Review. 112 (5): 1555–1567. Bibcode:1958PhRv..112.1555H. doi:10.1103/PhysRev.112.1555.