收缩宇宙学与沼泽地
Contracting Cosmologies and the Swampland
摘要：
我们考虑使用具有负势能的标量场获得的宇宙学，例如用于获得收缩的Ekpyrotic相。应用协变熵约束的塔的状态所规定的距离猜想，我们发现，相对斜率的潜力$|V^{\prime}| / |V|$是有界的从下面的常数的顺序一普朗克单位。这与获得缓慢自燃收缩的要求一致。我们还得到了一个细化的条件，潜在的持有附近的局部极小值的负电位。
英文摘要：
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 $|V^{\prime}| / |V|$ 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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