论文标题
与非最小耦合的巨大重力
Massive gravity with non-minimal coupling
论文作者
论文摘要
我们提出了具有5个动态自由度的新的大型重力理论。我们通过采用“广义大型重力”框架，避免了有关动力学和潜在术语形式的唯一定理，在该框架中破坏了全局翻译不变性。通过利用田间空间中的旋转对称性，我们确定了两个新的理论类别。第一个是具有非最小耦合的广义大型重力的扩展。另一方面，第二种理论产生的质量术语与de Rham，Gabadadze，Tolley Construction和Trivelly的自由度不同。这两种理论都允许稳定的宇宙学解决方案，而无需无限的强耦合，它们没有幽灵和梯度不稳定性。
We propose new massive gravity theories with 5 dynamical degrees of freedom. We evade uniqueness theorems regarding the form of the kinetic and potential terms by adopting the "generalized massive gravity" framework, where a global translation invariance is broken. By exploiting the rotation symmetry in the field space, we determine two novel classes of theories. The first one is an extension of generalized massive gravity with a non-minimal coupling. On the other hand, the second theory produces a mass term that is different from de Rham, Gabadadze, Tolley construction and trivially has 5 degrees of freedom. Both theories allows for stable cosmological solutions without infinite strong coupling, which are free of ghost and gradient instabilities.
