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In theoretical physics, a dressed particle or clothed particle is a bare particle together with some excitations of other that are inseparable from the bare particle. For example, a dressed electron includes the cloud of virtual electron–positron pairs and surrounding the original electron. Another example are polaritons 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.
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