تقرير
New Cosmological Solutions of a Nonlocal Gravity Model
| العنوان: | New Cosmological Solutions of a Nonlocal Gravity Model |
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| المؤلفون: | Dimitrijevic, Ivan, Dragovich, Branko, Rakic, Zoran, Stankovic, Jelena |
| المصدر: | Symmetry 2022, 14, 3 |
| سنة النشر: | 2021 |
| 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: | A nonlocal gravity model (2.1) was introduced and considered recently [49], and two exact cosmological solutions in flat space were presented. The first solution is related to some radiation effects generated by nonlocal dynamics on dark energy background, while the second one is a nonsingular time symmetric bounce. In the present paper we investigate other possible exact cosmological solutions and find some the new ones in nonflat space. Used nonlocal gravity dynamics can change background topology. To solve the corresponding eqations of motion, we first look for a solution of the eigenvalue problem $\Box (R -4\Lambda) = q\ (R - 4\Lambda) .$ We also discuss possible extension of this model with nonlocal operator symmetric under $\Box \longleftrightarrow \Box^{-1}$ and its connection with another interesting nonlocal gravity model. Comment: 18 pages, submitted to the journal Symmetry |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3390/sym14010003 |
| الوصول الحر: | http://arxiv.org/abs/2112.06312Test |
| رقم الانضمام: | edsarx.2112.06312 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3390/sym14010003 |
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