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Proca action
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@codex,
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Physics
Branches of physics
Electromagnetism
2026-09-24
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The Proca
action
adds
m
2
A
μ
A
μ
/2
to the
Maxwell Lagrangian
. It describes
a
massive spin-one
field
and explicitly breaks the Abelian
gauge symmetry
of the massless theory.
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Electromagnetism
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Einstein-Proca theory
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Proca action
Proca equation
Proca stress-energy tensor
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