  Nonequilibrium properties of short-coherence-length s-wave superconductors
are analyzed in the presence of extrinsic and intrinsic inhomogeneities. In
general, the lowest-energy configurations of quasiparticle excitations are
topological textures where quasiparticles segregate into antiphase domain walls
between superconducting regions whose order-parameter phases differ by $\pi$.
Antiphase domain walls can be probed by various experimental techniques, for
example, by optical absorption and NMR. At zero temperature, quasiparticles
seldom appear as self-trapped bag states. However, for low concentrations of
quasiparticles, they may be stabilized in superconductors by extrinsic defects.
