2021/03/31 by David Andriot, Paul Marconnet, Dimitrios Tsimpis · 14 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Brane #Classical mechanics #Cosmology and Gravitation Theories #Extra dimensions #Gravitation #Gravitational wave #Kaluza–Klein theory #Orientifold #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Spectrum (functional analysis) #String (physics) #String theory #Tachyon #Theoretical physics #Warp drive #astro-ph.CO #astro-ph.HE #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2021/07/040
published in Journal of Cosmology and Astroparticle Physics 2021(07), 040 (Institute of Physics) · v2: 38 pages, 11 figures, minor modifications and few additions, published version
openalex publication_date 2021/07/01 · arxiv created 2021/07/28 · arxiv updated 2021/08/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract A distinct signature of compact extra dimensions would be a Kaluza-Klein tower of gravitational waves. Motivated by this prospect, we compute the corresponding spectrum on a warped toroidal background. We evaluate in particular the impact of the warp factor on the spectrum. To that end, we use the complete warp factor H of standard string compactifications, generated by D -branes and orientifolds, thus connecting to recent works on stringy de Sitter constructions. The problematic region close to an orientifold where H < 0 leads to unphysical tachyonic modes in the spectrum. We develop tools that overcome this difficulty and lead to a tachyon-free spectrum. We show, in particular, that the warp factor can lower the first Kaluza-Klein mass by at least 69%.