  We introduce a nanowire-based photonic crystal waveguide system capable of
controllably mediating the photon coupling between two quantum dots which are
macroscopically separated. Using a rigorous Green-function-based master
equation approach, our two-dot system is shown to provide a wide range of
interesting quantum regimes. In particular, we demonstrate the formation of
long-lived entangled states and study the resonance fluorescence spectrum which
contains clear signatures of the coupled quantum dot pair. Depending upon the
operating frequency, one can obtain a modified Mollow triplet spectrum or a
Mollow nonuplet, namely a spectrum with nine spectral peaks. These multiple
peaks are explained in the context of photon-exchange-mediated dressed states.
Results are robust with respect to scattering loss, and spatial filtering via
propagation allows for each quantum dot's emission to be observed individually.
