We present a new
method to obtain Willmore–Chen submanifolds in spaces endowed with warped
product metrics and fibers being a given homogeneous space. The main
points are: First the invariance of the variational problem of Willmore–Chen
with respect to the conformal changes in the ambient space metric. Second,
the principle of symmetric criticality which allows us to relate the problem
with that for generalized elastic curves in the conformal structure on the
base.
We obtain some applications of our method, including one, to get a rational one
parameter family of Willmore tori in the standard 3-sphere shaped on an
associated family of closed free elastic curves in the standard hyperbolic
2-plane.
We also get a 3-dimensional Riemannian manifold which is foliated with leaves
being nontrivial Willmore tori.
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