Investigating Cosmic Inflation and Dark Energy in blended models of Particle Theory and Modified Gravity

研究粒子理论和修正重力混合模型中的宇宙膨胀和暗能量

• 批准号: 2604863
• 金额: --
• 依托单位: Lancaster University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2604863
• 关键词: Investigating; Cosmic; Inflation; Dark; Energy

We aim to study model-building cosmic inflation and dark energy, possibly in a single theoretical framework, employing realistic particle theories beyond the standard model and also modified gravity theories, such as F(R) gravity. We intend to produce concrete predictions regarding the inflationary observables (scalar spectral index, tensor to scalar ratio) as well as characteristics of dark energy beyond CDM, such as the equation of state parameter and its running, to be probed in the near future, e.g. by the EUCLID and Nancy Grace Roman satellites. Contrast with observations will provide insights on the theoretical background. Emphasis will be given on the resolutions of cosmological open questions, such as the Hubble and growth tensions, and on observational signatures of gravitational waves, such as amplified primordial gravitational waves from inflation (or kination) or from primordial black holes (which could be the dark matter), to be probed in the near future directly by LIGO/Virgo of LISA or indirectly by forthcoming CMB observations, e.g. BICEP, SPIDER, Simons.

我们的目标是研究建立宇宙膨胀和暗能量的模型，可能是在一个单一的理论框架内，使用标准模型之外的现实粒子理论，以及修正的引力理论，如F(R)引力。我们打算对膨胀观测数据(标量光谱指数、张量与标量之比)以及清洁发展机制以外的暗能量的特征，例如状态方程参数及其运行作出具体的预测，以便在不久的将来，例如欧几里德和南希·格蕾丝·罗马卫星进行探测。对比观察将提供对理论背景的洞察。重点将放在宇宙学悬而未决的问题的解决上，例如哈勃和生长张力，以及引力波的观测特征，例如来自膨胀(或碰撞)或原始黑洞(可能是暗物质)的放大的原始引力波，将在不久的将来由LIGO/处女座的LISA直接探测，或由即将到来的CMB观测间接探测，例如BICEP、蜘蛛、西蒙斯。