非对易时空中的动能项暴涨宇宙

暴涨宇宙也可以通过暴涨场的动能项来实现,称为K-inflation暴涨模型.在暴涨时期,宇宙的能量非常高,引力的效应也比较大.根据广义相对论,引力是由时空的几何来描述的.笔者以时空测不准原理作为出发点,研究了在非对易时空中的K-inflation模型.结果表明,在该模型中,所有的扰动模式都产生在视界之内,并且时空的非对易效应以线性项的形式贡献到扰动的功率谱指数中.与实验观测比较之后,发现该模型能够比较好地符合最新的数据.

Non-commutative K-inflation

Inflation could be also driven by kinetic terms of the inflaton field ,which is called the K-inflation model. During the in- flation epoch, one could not neglect gravitational effect since the energy was so much high. According to general relativity, gravity is described by space-time geometry. By considering the space-time uncertainty, it is found that all the modes were created inside the Hubble horizon, and it contributes a linear term in the spectral index of the scalar and tensor power spectral.