Classical vacuum
= Classical vacuum
{title2=$V(\phi_v)=\min V$}
= Classical vacua
{synonym}
A spatially homogeneous field value minimizing the potential energy. For a <finite-energy field configuration> on an infinite domain, the potential is normally shifted so the relevant vacuum energy density is zero. Disconnected components of the <vacuum manifold> allow a <scalar-field kink> to connect distinct vacuum values.