Semiclassical cosmology with polymer matter

Abstract

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.

11 pages, 3 figures. (CQG Focus issue: Applications of loop quantum gravity to cosmology)

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Cited by in corpus (5)

• An Overview on the Nature of the Bounce in LQC and PQM
• Classical polymerization of the Schwarzschild metric
• Semiclassical and quantum behavior of the Mixmaster model in the polymer approach for the isotropic Misner variable
• Natural Inflation from Polymer Quantization
• Monte Carlo simulation of cosmologies with dust