Multiple inflation and the WMAP 'glitches'
Multiple inflation and the WMAP 'glitches'
复制标题
多重通胀和 WMAP“故障”
DOI：
10.1103/physrevd.70.103518
复制
发表时间：
2004
影响因子：
5
通讯作者：
S. Sarkar
中科院分区：
文献类型：
--
作者：
P. Hunt;S. Sarkar
由威尔金森微波各向异性探测器对宇宙微波背景中各向异性的观测表明了原初曲率扰动振荡的可能性。这种偏离通常假设的无标度谱的情况在多重暴胀模型中得到了预测，其中“平坦方向”场由于驱动暴胀的大真空能量破坏了超对称性而经历了快速相变。这导致暴胀子（引力耦合）的质量突然变化，并中断了它的缓慢滚动。我们计算分析所产生的修改曲率扰动，并演示如何产生的振荡。
Observations of anisotropies in the cosmic microwave background by the Wilkinson Microwave Anisotropy Probe suggest the possibility of oscillations in the primordial curvature perturbation. Such deviations from the usually assumed scale-free spectrum were predicted in the multiple inflation model wherein 'flat direction' fields undergo rapid phase transitions due to the breaking of supersymmetry by the large vacuum energy driving inflation. This causes sudden changes in the mass of the (gravitationally coupled) inflaton and interrupts its slow roll. We calculate analytically the resulting modifications to the curvature perturbation and demonstrate how the oscillations arise.