Exploring the pre-inflationary universe for the family of α -attractor potentials
Myrzakulov Y. Tsyba P. Myrzakul S. Kurbanbay Z. Yerzhanov K. Razina O.
2025World Scientific
International Journal of Geometric Methods in Modern Physics
2025
In the framework of loop quantum cosmology, we investigate the dynamics of pre-inflation with a family of α-attractor potentials. At the quantum bounce, either the kinetic energy or the potential energy of the inflation field dominates the background evolution. We determine the physically feasible initial conditions in both classes that yield the slow-roll inflation and enough number of e-folds to be consistent with observations. The background evolution before reheating is consistently divided into three distinct phases: bouncing, transition, and slow-roll inflation in the case of kinetic energy dominated evolution at the bounce, while the first two phases disappear in the case of potential energy dominated evolution, though slow-roll inflation is still possible. We also explore the phase space trajectories for physically feasible initial conditions of the inflaton field and study the phase space analysis for a class of α-attractor potentials.
Inflation , loop quantum cosmology
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Department of General and Theoretical Physics, L. N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Department of General and Theoretical Physics
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026