Resonant primordial gravitational waves amplification
We propose a mechanism to evade the Lyth bound in models of inflation. We minimally extend the conventional single-field inflation model in general relativity (GR) to a theory with non-vanishing graviton mass in the very early universe. The modification primarily affects the tensor perturbation, whi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2016-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315008692 |
| _version_ | 1818960678687342592 |
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| author | Chunshan Lin Misao Sasaki |
| author_facet | Chunshan Lin Misao Sasaki |
| author_sort | Chunshan Lin |
| collection | DOAJ |
| description | We propose a mechanism to evade the Lyth bound in models of inflation. We minimally extend the conventional single-field inflation model in general relativity (GR) to a theory with non-vanishing graviton mass in the very early universe. The modification primarily affects the tensor perturbation, while the scalar and vector perturbations are the same as the ones in GR with a single scalar field at least at the level of linear perturbation theory. During the reheating stage, the graviton mass oscillates coherently and leads to resonant amplification of the primordial tensor perturbation. After reheating the graviton mass vanishes and we recover GR. |
| first_indexed | 2024-12-20T12:01:21Z |
| format | Article |
| id | doaj.art-68d12c11950d416ab2d3cad2b41cd80e |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-20T12:01:21Z |
| publishDate | 2016-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-68d12c11950d416ab2d3cad2b41cd80e2022-12-21T19:41:31ZengElsevierPhysics Letters B0370-26931873-24452016-01-01752C848810.1016/j.physletb.2015.11.021Resonant primordial gravitational waves amplificationChunshan LinMisao SasakiWe propose a mechanism to evade the Lyth bound in models of inflation. We minimally extend the conventional single-field inflation model in general relativity (GR) to a theory with non-vanishing graviton mass in the very early universe. The modification primarily affects the tensor perturbation, while the scalar and vector perturbations are the same as the ones in GR with a single scalar field at least at the level of linear perturbation theory. During the reheating stage, the graviton mass oscillates coherently and leads to resonant amplification of the primordial tensor perturbation. After reheating the graviton mass vanishes and we recover GR.http://www.sciencedirect.com/science/article/pii/S0370269315008692 |
| spellingShingle | Chunshan Lin Misao Sasaki Resonant primordial gravitational waves amplification Physics Letters B |
| title | Resonant primordial gravitational waves amplification |
| title_full | Resonant primordial gravitational waves amplification |
| title_fullStr | Resonant primordial gravitational waves amplification |
| title_full_unstemmed | Resonant primordial gravitational waves amplification |
| title_short | Resonant primordial gravitational waves amplification |
| title_sort | resonant primordial gravitational waves amplification |
| url | http://www.sciencedirect.com/science/article/pii/S0370269315008692 |
| work_keys_str_mv | AT chunshanlin resonantprimordialgravitationalwavesamplification AT misaosasaki resonantprimordialgravitationalwavesamplification |