  One-way quantum steering is of importance for quantum technologies, such as
secure quantum teleportation. In this paper, we study the generation of one-way
quantum steering between two distant yttrium iron garnet (YIG) microspheres in
chiral waveguide electromagonics. We consider that the magnon mode with the
Kerr nonlinearity in each YIG sphere is chirally coupled to left- and
right-propagating guided photons in the waveguide. We find that quantum
steering between the magnon modes is absent with non-chirality but is present
merely in the form of one way (i.e., one-way steering) when the chirality
occurs. The maximal achievable steering is obviously improved as the chirality
degree increases. We further find that when the waveguide's outputs are
subjected to continuous homodyne detection, the steering can be considerably
enhanced and asymmetric steering with strong entanglement can also be achieved
by tuning the chirality. Our study shows that chirality can be explored to
effectively realize one-way quantum steering. Compared to other studies on
achieving asymmetric steering via controlling intrinsic dissipation, e.g.
cavity loss rates, our scheme merely depends on the chirality enabled via
positioning the micromagnets in the waveguide and is continuously adjustable
and experimentally more feasible.
