快子暴涨的Hamilton-Jacobi形式及宇宙学扰动

Hamilton-Jacobi formalism of tachyon inflation and cosmological perturbations

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.

We study the cosmological inflation models driven by the rolling tachyon field which has a Born-Infeld-type action. We drive the Hamilton-Jaeobi 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.