Biasing and the search for primordial non-Gaussianity beyond the local
  type
  Primordial non-Gaussianity encodes valuable information about the physics of
inflation, including the spectrum of particles and interactions. Significant
improvements in our understanding of non-Gaussanity beyond Planck require
information from large-scale structure. The most promising approach to utilize
this information comes from the scale-dependent bias of halos. For local
non-Gaussanity, the improvements available are well studied but the potential
for non-Gaussianity beyond the local type, including equilateral and
quasi-single field inflation, is much less well understood. In this paper, we
forecast the capabilities of large-scale structure surveys to detect general
non-Gaussianity through galaxy/halo power spectra. We study how non-Gaussanity
can be distinguished from a general biasing model and where the information is
encoded. For quasi-single field inflation, significant improvements over Planck
are possible in some regions of parameter space. We also show that the
multi-tracer technique can significantly improve the sensitivity for all
non-Gaussianity types, providing up to an order of magnitude improvement for
equilateral non-Gaussianity over the single-tracer measurement.
