Gravitational Wave From Axion-like Particle Inflation

Understand

In this paper, we investigate the Axion-like Particle inflation by applying the multi-nature inflation model, where the end of inflation is achieved through the phase transition (PT).

• The events of PT should not be less than $200$, which results in the free parameter $n\geq404$.
• Under the latest CMB restrictions, we found that the inflation energy is fixed at $10^{15} \rm{GeV}$.
• Then, we deeply discussed the corresponding stochastic background of the primordial gravitational wave (GW) during inflation.