Lee-Wick radiation induced bouncing universe models

Understand

The present article discusses about the effect of a Lee-Wick partner infested radiation phase of the early universe.

• As Lee-Wick partners can contribute negative energy density so it is always possible that at some early phase of the universe when the Lee-Wick partners were thermalized the total energy density of the universe became very small making the effective Hubble radius very big.
• This possibility gives rise to the probability of a bouncing universe.
• As will be shown in the article that a simple Lee-Wick radiation is not enough to produce a bounce.