FLRW spaces as submanifolds of ${\mathbb{R}}^6$: restriction to the Klein-Gordon operator

J. P. Arias Zapata, A. Belokogne, E. Huguet +2

The FLRW spacetimes can be realized as submanifolds of ${\mathbb{R}}^6$. In this paper we relate the Laplace-Beltrami operator for an homogeneous scalar field $\varphi$ of ${\mathbb{R}}^6$ t…