向量膨胀
Vector Inflation
摘要：
我们提出了一个方案，其中通货膨胀是由非最小耦合的大规模向量场驱动。在一个各向同性的均匀宇宙中，这些场的行为与一个有质量的最小耦合标量场的行为几乎相同。因此，我们的模型与标量场的混沌暴胀模型非常相似。对于矢量场，展开的各向同性可以通过考虑三重正交矢量场或以$N$随机定向矢量场为代价来实现。在最后一种情况下，$1/\sqrt{N}$阶膨胀的实质各向异性持续到膨胀结束。最轻的矢量场也可能迫使宇宙的后期加速。
英文摘要：
We propose a scenario where inflation is driven by non-minimally coupled massive vector fields. In an isotropic homogeneous universe these fields behave in presicely the same way as a massive minimally coupled scalar field. Therefore our model is very similar to the model of chaotic inflation with scalar field. For vector fields the isotropy of expansion is achived either by considering a triplet of orthogonal vector fields or for the expense of $N$ randomly oriented vector fields. In the last case the substantial anisotropy of the expansion of order $1/\sqrt{N}$ survives until the end of inflation. The lightest vector fields might also force the late time acceleration of the Universe.
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