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Additional
Mixed anomaly
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Mixed anomaly
In
theoretical physics
, a
mixed anomaly
is an example of an
anomaly
: it is an effect of
quantum mechanics
— usually a
one-loop diagram
— that implies that the classically valid
general covariance
and
gauge symmetry
of a theory of
general relativity
combined with
gauge fields
and
fermionic
fields cannot be preserved simultaneously in the quantum theory.
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