摘要: |
讨论带有Born-Infeld作用量的快子场所驱动的暴涨模型.首先给出了快子暴涨方程的Hamilton-Jacobi形式并且考虑如何去解Hamilton-Jacobi方程;然后讨论快子场的宇宙学扰动给出扰动场的模方程;最后,讨论了一个真实的由弦理论得来的滚动快子模型. |
关键词: 快子暴涨 Hamilton-Jacobi方程 宇宙学扰动 |
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基金项目:上海市自然科学基金项目(12ZR142170); 上海师范大学创新团队项目(DXL124) |
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Hamilton-Jacobi formalism of tachyon inflation and cosmological perturbations |
LIU Daojun
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Shanghai United Center for Astrophysics(SUCA),Shanghai Normal University
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Abstract: |
We study the cosmological inflation models driven by the rolling tachyon field which has a Born-Infeld-type action.We drive the Hamilton-Jacobi equation for the cosmological dynamics of tachyon inflation and the mode equations for the scalar and tensor perturbations of tachyon field and spacetime, then a solution under the slow-roll condition is given. In the end,a realistic model from string theory is discussed. |
Key words: tachyon inflation Hamilton-Jacobi equation cosmological perturbation |