= Antikink
{title2=$Q=-1$}
An <antikink> is a <scalar-field kink> with the opposite orientation of its vacuum boundary values. If $\phi_K(x)$ joins vacua $\phi_-$ to $\phi_+$, then $\phi_K(-x)$ joins $\phi_+$ to $\phi_-$. For an even double-well potential and an odd centered <phi-four kink>, the centered <antikink> is $-\phi_K(x)$. With $Q=[\phi(+\infty)-\phi(-\infty)]/(\phi_+-\phi_-)$, a <kink> has $Q=1$ and an <antikink> has $Q=-1$. Their localized energies coincide by spatial reflection.
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