تقرير
Gravitational-wave background in bouncing models from semi-classical, quantum and string gravity
| العنوان: | Gravitational-wave background in bouncing models from semi-classical, quantum and string gravity |
|---|---|
| المؤلفون: | Ben-Dayan, Ido, Calcagni, Gianluca, Gasperini, Maurizio, Mazumdar, Anupam, Pavone, Eliseo, Thattarampilly, Udaykrishna, Verma, Amresh |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Theory |
| الوصف: | We study the primordial spectra and the gravitational-wave background (GWB) of three models of semi-classical, quantum or string gravity where the big bang is replaced by a bounce and the tensor spectrum is blue-tilted: ekpyrotic universe with fast-rolling Galileons, string-gas cosmology with Atick-Witten conjecture and pre-big-bang cosmology. We find that the ekpyrotic scenario does not produce a GWB amplitude detectable by present or third-generation interferometers, while the string-gas model is ruled out for producing too large a signal. In contrast, the GWB of the pre-big-bang scenario falls within the sensitivity window of both LISA and Einstein Telescope, where it takes the form of a single or a broken power law depending on the choice of parameters. The latter will be tightly constrained by both detectors. Comment: 1+33 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/2406.13521Test |
| رقم الانضمام: | edsarx.2406.13521 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |