  We propose to observe and manipulate topological edge spins in 1D optical
lattice based on currently available experimental platforms. Coupling the
atomic spin states to a laser-induced periodic Zeeman field, the lattice system
can be driven into a symmetry protected topological (SPT) phase, which belongs
to the chiral unitary (AIII) class protected by particle number conservation
and chiral symmetries. In free-fermion case the SPT phase is classified by a
$Z$ invariant which reduces to $Z_4$ with interactions. The zero edge modes of
the SPT phase are spin-polarized, with left and right edge spins polarized to
opposite directions and forming a topological spin-qubit (TSQ). We demonstrate
a novel scheme to manipulate the zero modes and realize single spin control in
optical lattice. The manipulation of TSQs has potential applications to quantum
computation.
