  The key feature of time-dependent dynamics in a paired Fermi superfluid is
the presence of a large number of independent degrees of freedom---the pairing
amplitudes of fermions with different momenta. We argue that useful prototypes
of this dynamics come from D-brane constructions of string theory. Using a
specific example of that kind, we identify the mechanism by which a strongly
coupled Fermi superfluid relaxes to equilibrium; it involves a wave of
excitation in the momentum space, propagating from the Fermi surface towards
the ultraviolet. For a sudden quench induced by a change in the fermion
coupling, we find that the relaxation occurs rapidly, over only a few
oscillations of the quasiparticle gap.
