تقرير
Quantum-gravitational corrections to the power spectrum for a closed universe
| العنوان: | Quantum-gravitational corrections to the power spectrum for a closed universe |
|---|---|
| المؤلفون: | Vardanyan, Tatevik, Kiefer, Claus |
| سنة النشر: | 2023 |
| المجموعة: | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology, High Energy Physics - Theory |
| الوصف: | We study the quantum-gravitational corrections to the power spectrum of a gauge-invariant inflationary scalar perturbations in a closed model of a universe. We consider canonical quantum gravity as an approach to quantizing gravity. This leads to the Wheeler-DeWitt equation, which has been studied by applying a semiclassical Born-Oppenheimer type of approximation. At the corresponding orders of approximation, we recover both the uncorrected and quantum-gravitationally corrected Schroedinger equations for the perturbation modes from which we calculate the quantum-gravitational corrections to the power spectrum in the slow-roll regime. The results are compared to the power spectra for the flat model of the universe. Comment: 7 pages, 1 figure. Contribution to the Proceedings of the DICE2022 meeting, Castiglioncello, September 2022 |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/2302.07001Test |
| رقم الانضمام: | edsarx.2302.07001 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |