Fundamental Physics from Cosmic Microwave Background Anisotropies and Gravitational Waves

两种新的观测能力有望彻底改变我们对自然基本定律、宇宙历史和进化的理解：宇宙微波背景辐射（CMB；来自早期宇宙的光）的灵敏度边界和引力波（时空涟漪）的探测。拟议的研究计划旨在将这些新的观测前沿与理论物理学建立必要的联系，以实现这一承诺，最大限度地从即将到来的宇宙学和引力波数据集中获得科学回报。这个及时的项目有可能解决一些最基本的科学问题，比如：暗物质和暗能量的本质是什么？宇宙是如何开始的？万有引力的本质是什么？******正在进行的CMB高分辨率测量已经达到了获得次级CMB温度和极化各向异性所必需的精度，这些各向异性分别是由CMB光子与暗物质或自由电子的引力或电磁相互作用产生的。利用分析方法和大型宇宙学模拟，拟议的研究将确定次级CMB如何与大尺度结构（LSS）调查相结合，用于约束早期宇宙的模型，如宇宙暴胀、暗能量物理和宇宙尺度上的引力本质。在本研究中进行的详细预测将定义未来对CMB和LSS观测可获得的知识边界。******首次探测到来自双黑洞和双中子星并合的引力波开启了引力波天文学的时代。这些事件以以前无法实验的强度探测重力。观测到的宇宙加速膨胀，与暗能量有关，也在这样一个强大的引力制度下运作。拟议的研究将利用这两个强引力边界之间的联系，以便设计新的暗能量、引力和粒子物理测试，使用黑洞、中子星和双星系统。通过详细的相对论模拟和分析计算，我们将阐明基础物理对引力波和电磁对应物的影响，为现有和近期的引力波天文台提供详细的预测。******拟议的研究将大力推进我的广泛目标，即通过对宇宙学和天体物理学的影响，开发测试基础物理学的新方法。相关的培训计划将培养出精通理论和数据以及高度专业化的分析和数值方法的唯一合格的HQP。这些技能将使HQP在高影响力的科学或与加拿大日益增长的知识经济相关的行业中追求成功的未来。

Two new observational capabilities promise to revolutionize our understanding of the fundamental laws of nature and the history and evolution of the Universe: the sensitivity frontier of the cosmic microwave background radiation (CMB; light from the early Universe) and the detection of gravitational waves (ripples in spacetime). The proposed research program aims to make the necessary connections between these new observational frontiers and theoretical physics to realize this promise, maximizing the science return from impending cosmological and gravitational wave datasets. This timely program has the potential to address some of the most fundamental questions in science such as: What is the nature of dark matter and dark energy? How did the Universe begin? What is the nature of gravitation? ******Ongoing high-resolution measurements of the CMB have reached the precision necessary to access the secondary CMB temperature and polarization anisotropies created when CMB photons interact gravitationally or electromagnetically with dark matter or free electrons, respectively. Using analytic methods and large cosmological simulations, the proposed research will establish how the secondary CMB, in concert with large scale structure (LSS) surveys, can be used to constrain models of the early Universe such as cosmic inflation, dark energy physics, and the nature of gravitation on cosmological scales. The detailed forecasts performed in this research will define the boundary of knowledge accessible in future observations of the CMB and LSS. ******The first detections of gravitational waves from binary black hole and binary neutron star mergers has ushered in the era of gravitational wave astronomy. These events probe gravity at strengths previously inaccessible to experiment. The observed accelerated expansion of the Universe, associated with dark energy, also operates in such a strong gravity regime. The proposed research will exploit connections between these two strong gravity frontiers in order to devise new tests of dark energy, gravitation, and particle physics using black holes, neutron stars, and binary systems. Employing detailed relativistic simulations and analytic calculations, we will elucidate the imprint of fundamental physics on gravitational waveforms and electromagnetic couterparts, producing detailed forecasts for existing and near-future gravitational wave observatories.******The proposed research will vigorously advance my broad goal of developing new ways of testing fundamental physics through its impact on cosmology and astrophysics. The associated training program will produce uniquely qualified HQP well versed in theory and data as well as highly specialized analytic and numerical methods. These skills will enable HQP to pursue a successful future either in high-impact science or industries associated with Canada's growing knowledge economy.