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Vacuum polarization
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Vacuum polarization
In
quantum field theory
, and specifically
quantum electrodynamics
,
vacuum polarization
describes a process in which a background
electromagnetic field
produces
virtual
electron
–
positron
pairs that change the distribution of charges and currents that generated the original electromagnetic field. It is also sometimes referred to as the
self energy
of the
gauge boson
(
photon
).
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