On the possibility of blue tensor spectrum within single field inflation
We present a series of theoretical constraints on the potentially viable inflation models that might yield a blue spectrum for primordial tensor perturbations. By performing a detailed dynamical analysis we show that, while there exists such possibility, the corresponding phase space is strongly bou...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-11-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0550321315003442 |
| _version_ | 1811238896055353344 |
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| author | Yi-Fu Cai Jinn-Ouk Gong Shi Pi Emmanuel N. Saridakis Shang-Yu Wu |
| author_facet | Yi-Fu Cai Jinn-Ouk Gong Shi Pi Emmanuel N. Saridakis Shang-Yu Wu |
| author_sort | Yi-Fu Cai |
| collection | DOAJ |
| description | We present a series of theoretical constraints on the potentially viable inflation models that might yield a blue spectrum for primordial tensor perturbations. By performing a detailed dynamical analysis we show that, while there exists such possibility, the corresponding phase space is strongly bounded. Our result implies that, in order to achieve a blue tilt for inflationary tensor perturbations, one may either construct a non-canonical inflation model delicately, or study the generation of primordial tensor modes beyond the standard scenario of single slow-roll field. |
| first_indexed | 2024-04-12T12:50:19Z |
| format | Article |
| id | doaj.art-25873ee96f754a6d847ee9fdff98ca35 |
| institution | Directory Open Access Journal |
| issn | 0550-3213 1873-1562 |
| language | English |
| last_indexed | 2024-04-12T12:50:19Z |
| publishDate | 2015-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj.art-25873ee96f754a6d847ee9fdff98ca352022-12-22T03:32:29ZengElsevierNuclear Physics B0550-32131873-15622015-11-01900C51753210.1016/j.nuclphysb.2015.09.025On the possibility of blue tensor spectrum within single field inflationYi-Fu Cai0Jinn-Ouk Gong1Shi Pi2Emmanuel N. Saridakis3Shang-Yu Wu4CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, ChinaAsia Pacific Center for Theoretical Physics, Pohang 790-784, Republic of KoreaAsia Pacific Center for Theoretical Physics, Pohang 790-784, Republic of KoreaPhysics Division, National Technical University of Athens, Zografou Campus, 15780 Athens, GreeceDepartment of Electrophysics, National Center for Theoretical Science, National Chiao Tung University, Hsinchu 300, TaiwanWe present a series of theoretical constraints on the potentially viable inflation models that might yield a blue spectrum for primordial tensor perturbations. By performing a detailed dynamical analysis we show that, while there exists such possibility, the corresponding phase space is strongly bounded. Our result implies that, in order to achieve a blue tilt for inflationary tensor perturbations, one may either construct a non-canonical inflation model delicately, or study the generation of primordial tensor modes beyond the standard scenario of single slow-roll field.http://www.sciencedirect.com/science/article/pii/S0550321315003442 |
| spellingShingle | Yi-Fu Cai Jinn-Ouk Gong Shi Pi Emmanuel N. Saridakis Shang-Yu Wu On the possibility of blue tensor spectrum within single field inflation Nuclear Physics B |
| title | On the possibility of blue tensor spectrum within single field inflation |
| title_full | On the possibility of blue tensor spectrum within single field inflation |
| title_fullStr | On the possibility of blue tensor spectrum within single field inflation |
| title_full_unstemmed | On the possibility of blue tensor spectrum within single field inflation |
| title_short | On the possibility of blue tensor spectrum within single field inflation |
| title_sort | on the possibility of blue tensor spectrum within single field inflation |
| url | http://www.sciencedirect.com/science/article/pii/S0550321315003442 |
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