767 citations · 17k across the 373 of their papers we have counts for
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Fluctuations through a Vibrating Bounce
Robert Brandenberger, Qiuyue Liang, Rudnei O. Ramos +1
We study the evolution of cosmological perturbations in a non-singular bouncing cosmology with a bounce phase which has superimposed oscillations of the scale factor. We identify l…
Point Particle Motion in DFT and a Singularity-Free Cosmological Solution
Robert Brandenberger, Renato Costa, Guilherme Franzmann +1
We generalize the action for point particle motion to a double field theory background. After deriving the general equations of motion for these particle geodesics, we specialize t…
Running of the Spectrum of Cosmological Perturbations in String Gas Cosmology
Robert Brandenberger, Guilherme Franzmann, Qiuyue Liang
We compute the running of the spectrum of cosmological perturbations in String Gas Cosmology, making use of a smooth parametrization of the transition between the early Hagedorn ph…
Fast Radio Bursts from the Decay of Cosmic String Cusps
Robert Brandenberger, Bryce Cyr, Aditya Varna Iyer
We explore the possibility that Fast Radio Bursts are due to the annihilation of cusps on cosmic string loops. We compute the energy released in the annihilation events in the radi…
Inflationary magneto-(non)genesis, increasing kinetic couplings, and the strong coupling problem
Hossein Bazrafshan Moghaddam, Evan McDonough, Ryo Namba +1
We study the generation of magnetic fields during inflation making use of a coupling of the inflaton and moduli fields to electromagnetism via the photon kinetic term, and assuming…
Cosmological perturbations and stability of nonsingular cosmologies with limiting curvature
Daisuke Yoshida, Jerome Quintin, Masahide Yamaguchi +1
We revisit nonsingular cosmologies in which the limiting curvature hypothesis is realized. We study the cosmological perturbations of the theory and determine the general criteria…
Dynamics of Cosmological Perturbations and Reheating in the Anamorphic Universe
L. L. Graef, W. S. Hipolito-Ricaldi, Elisa G. M. Ferreira +1
We discuss scalar-tensor realizations of the Anamorphic cosmological scenario recently proposed by Ijjas and Steinhardt. Through an analysis of the dynamics of cosmological perturb…