  Motivated by recent neutron scattering experiments on the cuprate
superconductors, we present a phenomenological framework describing the
dynamics of collective spin excitations coupled to charge/bond order
fluctuations. Our quantum lattice model contains two order parameter fields,
and can capture spin excitations both in broken-symmetry states with static
lattice modulations, as well as in homogeneous states where the charge/bond
order is fluctuating. We present results for different types of static
charge/bond order, namely site- and bond-centered stripes, and plaquette
modulation.
