Resolution of Singularities in Quantum Gravity and Quantum Cosmology.

量子引力和量子宇宙学中奇点的解决。

• 批准号: 2153880
• 金额: --
• 依托单位: University of Nottingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2153880
• 关键词: Resolution; Singularities; Quantum; Gravity; Cosmology.

Singularities arise in the context of general relativity like in black holes and at the Big Bang. They signal a breakdown of classical general relativity and the need for a quantum theory of gravity in order to obtain a more complete understanding. A lot of work for understanding these singularities has been done in simplified models (minisuperspace models) but it is far from clear whether these capture the relevant physics of full quantum gravity as such models often depend on additional ad-hoc assumptions whose fundamental justification is unclear. The goal of my PhD is to develop a more systematic and rigorous derivation of effective symmetry-reduced quantum cosmology models from proposed theories of quantum gravity such as group field theory (GFT) and loop quantum gravity (LQG). In particular the idea that a macroscopic universe is obtained from a "condensate" of a large number of interacting degrees of freedom of quantum geometry will be employed.

奇异性在一般相对论的背景下出现，例如在黑洞和大爆炸中。它们标志着经典的一般相对性的细分以及对重力理论的需求，以获得更完整的理解。在简化的模型（MinisuperSpace模型）中已经完成了许多用于理解这些奇点的工作，但是这些模型通常取决于其他临时假设，其基本理由尚不清楚，这些模型通常取决于其他临时假设。我的博士学位的目的是从提出的量子重力理论（例如组场理论（GFT）和环路量子重力（LQG））中开发出有效减少对称对称性量子宇宙学模型的更系统和严格的推导。特别是，将采用大量相互作用的量子几何自由度的“冷凝物”获得宏观宇宙的想法。

项目成果

Singularity resolution depends on the clock

奇点分辨率取决于时钟

• DOI: 10.1088/1361-6382/abb14f
• 发表时间: 2020
• 期刊: Classical and Quantum Gravity
• 影响因子: 3.5
• 作者: Gielen S