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hep-th2025
From the string vacuum to FLRW or de Sitter via corrections
P. Conzinu, G. Fanizza, M. Gasperini +3
We first make more precise a recent "Hamiltonian" reformulation of the Hohm-Zwiebach approach to the tree-level, -invariant string cosmology equations at all orders in the…
hep-th2025
Constraints on the Pre-Big Bang scenario from a cosmological interpretation of the NANOGrav data
P. Conzinu, G. Fanizza, M. Gasperini +3
We discuss a recently proposed fit of the 15-year data set obtained from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) in terms of a relic stochastic…