25 citations · 49 across the 5 of their papers we have counts for
5 papers
Measuring the expansion of the universe
Gabriel German
We draw a figure from where it is possible to measure the number of e-folds of expansion of the universe with a ruler. We find model independent bounds for the number of e-folds du…
On spherical dust fluctuations: the exact vs. the perturbative approach
Roberto A. Sussman, Juan Carlos Hidalgo, Peter K. S. Dunsby +1
We examine the relation between the dynamics of Lema\^ıtre-Tolman-Bondi (LTB) dust models (with and without ) and the dynamics of dust perturbations in two of the more familiar…
Discrete graviton spectrum from super-exponential cup potentials and their application to braneworld physics
Mariana Carrillo-Gonzalez, Gabriel German, Alfredo Herrera-Aguilar +2
Super-exponential warp factors have been proposed in the context of two-brane models to solve the gauge hierarchy problem of scales by using a compactification scale of the same or…
On the Lyth bound and single field slow-roll inflation
Gabriel German
We take a pragmatic, model independent approach to single field slow-roll inflation by imposing conditions to the slow-roll parameter and its derivative To accom…
Testing Hybrid Natural Inflation with BICEP2
Mariana Carrillo-Gonzalez, Gabriel German, Alfredo Herrera-Aguilar +2
We analyse Hybrid Natural Inflation in view of the recent results for the tensor index reported by BICEP2. We find that it predicts a large running of the scalar spectrum which is…