幂零Kähler修正的通货膨胀
Inflation from Nilpotent Kähler Corrections
摘要：
我们发展了一类新的超引力宇宙模型，其中膨胀是由Kähler势中的项引起的，该项将幂零超场$S$与手征扇区$Φ$混合。由于新的项是非（反）全纯的，因此不能通过Kähler变换去除，这些模型本质上是Kähler势驱动的。例如，这种项可能是由于反D3膜对弦论体几何的反反应而产生的。我们表明，这种机制是非常普遍的，并允许一个统一的描述通货膨胀和暗能量，可控超对称性破缺在真空中。当体场的内部几何是双曲的时，我们证明了小的微扰Kähler修正自然地导致$α$ -吸引子行为，暴胀预言与最新的普朗克数据非常一致
英文摘要：
We develop a new class of supergravity cosmological models where inflation is induced by terms in the Kähler potential which mix a nilpotent superfield $S$ with a chiral sector $Φ$. As the new terms are non-(anti)holomorphic, and hence cannot be removed by a Kähler transformation, these models are intrinsically Kähler potential driven. Such terms could arise for example due to a backreaction of an anti-D3 brane on the string theory bulk geometry. We show that this mechanism is very general and allows for a unified description of inflation and dark energy, with controllable SUSY breaking at the vacuum. When the internal geometry of the bulk field is hyperbolic, we prove that small perturbative Kähler corrections naturally lead to $α$-attractor behaviour, with inflationary predictions in excellent agreement with the latest Planck data
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