Multi-field inflation from holography
Multi-field inflation from holography
复制标题
全息多场膨胀
DOI：
10.1088/1475-7516/2015/01/028
复制
发表时间：
2014
影响因子：
6.4
通讯作者：
Yuko Urakawa
中科院分区：
文献类型：
--
作者：
Jaume Garriga;Kostas Skenderis;Yuko Urakawa
我们利用全息术开始了多场暴胀的研究。体光标量场对应于边界理论中的近边缘算子，对偶量子场论是由这种算子对CFT的变形。我们计算了一个简单模型中绝热扰动和熵扰动的功率谱，发现绝热曲率扰动在存在熵扰动时不守恒，但当熵扰动设为零或模型实际上是单个标量模型时守恒，这与宇宙学微扰理论的期望一致。
We initiate the study of multi-field inflation using holography. Bulk light scalar fields correspond to nearly marginal operators in the boundary theory and the dual quantum field theory is a deformation of a CFT by such operators. We compute the power spectra of adiabatic and entropy perturbations in a simple model and find that the adiabatic curvature perturbation is not conserved in the presence of entropy perturbations but becomes conserved when the entropy perturbations are set to zero or the model is effectively a single scalar model, in agreement with expectations from cosmological perturbation theory.