2 papers
hep-th2005
Falsifying Tree Level String Motivated Bouncing Cosmologies
C. P. Constantinidis, J. C. Fabris, R. G. Furtado +2
The string effective action at tree level contains, in its bosonic sector, the Einstein-Hilbert term, the dilaton, and the axion, besides scalar and gauge fields coming from the Ra…
hep-th2003
Adiabatic and entropy perturbations propagation in a bouncing Universe
Patrick Peter, Nelson Pinto-Neto, Diego A. Gonzalez
By studying some bouncing universe models dominated by a specific class of hydrodynamical fluids, we show that the primordial cosmological perturbations may propagate smoothly thro…