  In loop quantum cosmology, polymer quantization is applied to gravity and
Schrodinger quantization to matter. This approach misses interesting
cosmological dynamics coming from the polymer quantization of matter. We
demonstrate this in semiclassical cosmology with a scalar field and
pressureless dust: gravity is kept classical, dust is used to fix the time
gauge, and polymer quantization effects are isolated in the scalar field. The
resulting dynamics shows a period of inflation, both with and without a scalar
potential, and the emergence of a classical universe at late times. Since
gravity is not quantized, the cosmological singularity is not resolved, but our
results suggest that polymer quantization of both gravity and matter are
important for a complete picture.
