Cosmic eggs to relax the cosmological constant
| العنوان: | Cosmic eggs to relax the cosmological constant |
|---|---|
| المؤلفون: | Thomas Hertog, Thomas Van Riet, Rob Tielemans |
| بيانات النشر: | IOP Publishing Ltd, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | High Energy Physics - Theory, string theory and cosmology, media_common.quotation_subject, initial conditions and eternal universe, quantum cosmology, FOS: Physical sciences, Observable universe, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmological constant, Astronomy & Astrophysics, General Relativity and Quantum Cosmology, Cosmology, Physics, Particles & Fields, Theoretical physics, Vacuum energy, Quantum cosmology, media_common, Physics, Science & Technology, Astronomy and Astrophysics, Hierarchy problem, Universe, cosmological applications of theories with extra dimensions, High Energy Physics - Theory (hep-th), Physical Sciences, Quintessence |
| الوصف: | In theories with extra dimensions, the cosmological hierarchy problem can be thought of as the unnaturally large radius of the observable universe in Kaluza-Klein units. We sketch a dynamical mechanism that relaxes this. In the early universe scenario we propose, three large spatial dimensions arise through tunneling from a 'cosmic egg', an effectively one-dimensional configuration with all spatial dimensions compact and of comparable, small size. If the string landscape is dominated by low-dimensional compactifications, cosmic eggs would be natural initial conditions for cosmology. A quantum cosmological treatment of a toy model egg predicts that, in a variant of the Hartle-Hawking state, cosmic eggs break to form higher dimensional universes with a small, but positive cosmological constant or quintessence energy. Hence cosmic egg cosmology yields a scenario in which the seemingly unnaturally small observed value of the vacuum energy can arise from natural initial conditions. 11 pages, 4 figures, 1 appendix |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::032550fa6d7e1fe5655557ab8da47aab https://lirias.kuleuven.be/handle/123456789/684972 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....032550fa6d7e1fe5655557ab8da47aab |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |