Programme

O.16 -- Oral, NCTP-43

Date: Wednesday, 1 August 2018

Time: 11:10 - 11:30

On a new anisotropic inflation model

Tuan Q. Do

Faculty of Physics, VNU University of Science, Vietnam National University, Hanoi

We will present main results of our new model for anisotropic inflation. As a result, this model belongs to a conformal–violating Maxwell theory, in which a new coupling, $J^2(X) F_{\mu\nu}F^{\mu\nu}$, where $J$ is a function of the kinetic term $X$ of scalar field $\phi$, is introduced. As a result, we are able to find out an anisotropic power-law solution to this model. More interestingly, stability analysis has been performed to indicate that the obtained solution is unstable during the inflation (a.k.a. rapid expansion) phase of the early-time universe but stable during the slow expansion phase of the late-time universe. This result implies that the cosmic no-hair conjecture seems to be violated during the slow expansion phase rather than the inflation phase in this proposed model.

Presenter: Do Q. Tuan