Inflationary Cosmology and Quantization Ambiguities in Semi-Classical   Loop Quantum Gravity
  In loop quantum gravity, modifications to the geometrical density cause a self-interacting scalar field to accelerate away from a minimum of its potential. In principle, this mechanism can generate the conditions that subsequently lead to slow-roll inflation. The consequences for this mechanism of various quantization ambiguities arising within loop quantum cosmology are considered. For the case of a quadratic potential, it is found that some quantization procedures are more likely to generate a phase of slow--roll inflation. In general, however, loop quantum cosmology is robust to ambiguities in the quantization and extends the range of initial conditions for inflation. 
Martin Bojowald (1), James E. Lidsey (2), David J. Mulryne (2),   Parampreet Singh (3), Reza Tavakol (2) ((1) Max-Planck-Ins...