7 citations · 17 across the 4 of their papers we have counts for
4 papers · 1 filter
Discrete symmetries determining scalar quantum modes on the de Sitter spacetime
Ion I. Cotaescu, Gabriel Pascu
The action of the discrete symmetries on the scalar mode functions of the de Sitter spacetime is studied. The invariance with respect to a combination of discrete symmetries is put…
On the rest and flat limits of the scalar modes on the de Sitter spacetime
Ion I. Cotaescu, Gabriel Pascu, Flavius Alin Dregoesc
The scalar mode functions on the spatially flat FLRW chart of the de Sitter spacetime are redefined in order to obtain a natural frequencies separation in the special local charts…
Atlas of Coordinate Charts on de Sitter Spacetime
Gabriel Pascu
The de Sitter manifold admits a wide variety of interesting coordinatizations. The 'atlas' is a compilation of the coordinate charts referenced throughout the literature, and is pr…
New Spherical Scalar Modes on the de Sitter Expanding Universe
Gabriel Pascu
New spherical scalar modes on the expanding part of Sitter spacetime, eigenfunctions of a conserved Hamiltonian-like operator are found by solving the Klein-Gordon equation in the…