期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP07(2021)206
关键词
Cosmology of Theories beyond the SM; Superstring Vacua; Compactification and String Models; Models of Quantum Gravity
资金
- NSERC
- Canada Research Chair program
This study investigates the cosmology obtained using scalar fields with negative potential energy, and applies the covariant entropy bound and distance conjecture to derive constraints on the potential. The findings suggest that the relative slope of the potential is bounded from below by a constant in Planck units for slow Ekpyrotic contraction.
We consider the cosmology obtained using scalar fields with a negative potential energy, such as employed to obtain an Ekpyrotic phase of contraction. Applying the covariant entropy bound to the tower of states dictated by the distance conjecture, we find that the relative slope of the potential |V '|/|V| is bounded from below by a constant of the order one in Planck units. This is consistent with the requirement to obtain slow Ekpyrotic contraction. We also derive a refined condition on the potential which holds near local minima of a negative potential.
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