Kesden Michael, Cooray Asantha, Kamionkowski Marc
California Institute of Technology, Mail Code 130-33, Pasadena, California 91125, USA.
Phys Rev Lett. 2002 Jul 1;89(1):011304. doi: 10.1103/PhysRevLett.89.011304. Epub 2002 Jun 18.
Inflationary gravitational waves (GW) contribute to the curl component in the polarization of the cosmic microwave background (CMB). Cosmic shear--gravitational lensing of the CMB--converts a fraction of the dominant gradient polarization to the curl component. Higher-order correlations can be used to map the cosmic shear and subtract this contribution to the curl. Arcminute resolution will be required to pursue GW amplitudes smaller than those accessible by the Planck surveyor mission. The blurring by lensing of small-scale CMB power leads with this reconstruction technique to a minimum detectable GW amplitude corresponding to an inflation energy near 10(15) GeV.
暴胀引力波（GW）对宇宙微波背景（CMB）偏振中的旋度分量有贡献。宇宙剪切——CMB的引力透镜效应——将一部分占主导的梯度偏振转换为旋度分量。高阶相关性可用于绘制宇宙剪切并减去对旋度的这一贡献。要探测比普朗克巡天任务所能探测到的振幅更小的GW振幅，将需要角分分辨率。这种重建技术会因小尺度CMB功率的透镜模糊效应而导致最小可探测GW振幅对应于接近10^15 GeV的暴胀能量。
