Fields taking values on manifold G/H with kinetic term Σg_ij(φ)∂φ^i∂φ^j; describes Goldstone bosons; chiral perturbation theory for pions.
Fields taking values on manifold G/H with kinetic term Σg_ij(φ)∂φ^i∂φ^j; describes Goldstone bosons; chiral perturbation theory for pions.