  We show that for a \textbf{multiple-connected} space the low energy strain
fields excitations are given by instantons. Dirac fermions with a chiral mass
and a pairing field propagates effectively in a multiple conected space. When
the elastic strain field response is probed one finds that it is given by the
\textbf{Pointriagin} characteristic. As a result the space time metric is
modified. Applying an external stress field we observe that the phonon path
bends in the transverse direction to the initial direction.
