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arXiv 1610.08960hep-thastro-ph.COgr-qc
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广义多重Proca域

Generalized multi-Proca fields

Jose Beltrán Jiménez, Lavinia Heisenberg

摘要:

我们扩展了以前的结果,健康的衍生自相互作用的Proca字段的情况下,一组大规模的向量场。我们获得非规范不变的衍生自相互作用的矢量场,保持适当数量的传播自由度。鉴于潜在的宇宙学应用,我们限制与内部旋转对称的相互作用。我们提供了一个系统的建设秩序秩序的衍生物的领域,并利用反对称列维-奇维塔张量。然后,我们比较与一个单一的向量场的情况下,并表明,相互作用可以大致分为两组,即从广义Proca项和真正的多Proca相互作用的直接延伸,没有对应的单Proca的情况下获得。我们还讨论了弯曲时空版本的相互作用,包括必要的非最小耦合引力。最后,我们探讨了宇宙学的应用,并表明,有三种不同的矢量场的配置产生各向同性的解决方案。其中两个已经在文献中被考虑过,第三个是前两个的组合,是新的,提供了未经探索的宇宙学场景。

英文摘要:

We extend previous results on healthy derivative self-interactions for a Proca field to the case of a set of massive vector fields. We obtain non-gauge invariant derivative self-interactions for the vector fields that maintain the appropriate number of propagating degrees of freedom. In view of the potential cosmological applications, we restrict to interactions with an internal rotational symmetry. We provide a systematical construction order by order in derivatives of the fields and making use of the antisymmetric Levi-Civita tensor. We then compare with the one single vector field case and show that the interactions can be broadly divided into two groups, namely the ones obtained from a direct extension of the generalized Proca terms and genuine multi-Proca interactions with no correspondence in the single Proca case. We also discuss the curved spacetime version of the interactions to include the necessary non-minimal couplings to gravity. Finally, we explore the cosmological applications and show that there are three different vector fields configurations giving rise to isotropic solutions. Two of them have already been considered in the literature and the third one, representing a combination of the first two, is new and offers unexplored cosmological scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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