1996/08/02 by Massimo Galluccio, M. Galluccio, M. Litterio +3 · 18 citations
Physics and Astronomy · #Astrophysics #Big Bang (financial markets) #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmic variance #Cosmology #Cosmology and Gravitation Theories #Einstein #Galaxies: Formation, Evolution, Phenomena #Gravitation #Gravitational wave #Graviton #Inflation (cosmology) #Omega #Particle physics #Physics #Quantum mechanics #String (physics) #String theory #Theoretical physics #Universe #gr-qc
paper · pdf · doi:10.1103/physrevlett.79.970
published in Physical Review Letters 79(6), 970-973 (American Physical Society) · 14 pages, RevTex source and 6 figures.ps
arxiv created 1996/08/02 · openalex publication_date 1997/08/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose to uncover the signature of a stringy era in the primordial Universe by searching for a prominent peak in the relic graviton spectrum. This feature, which in our specific model terminates an \ensuremathω3 increase and initiates an \ensuremathω^\ensuremath-7 decrease, is induced during the so far overlooked bounce of the scale factor between the collapsing deflationary era (or pre--big bang) and the expanding inflationary era (or post--big bang). The frequency and the intensity of the peak may likely fall in the realm of the new generation of interferometric detectors. The existence of a peak, at variance with ordinarily monotonic graviton spectra, would therefore offer strong support to string cosmology.