Fundamental aspects of classical and quantum gravity; the interplay of topology and dynamics in the structure of our universe

经典引力和量子引力的基本方面；

• 批准号: 106100-2009
• 负责人: Schleich, Kristin
• 金额: $ 1.82万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=522040
• 关键词: Fundamental; aspects; classical; quantum; gravity

A key issue in quantum gravity is to understand how a correct high energy theory that includes gravity, such as string theory, produces classical relativity in its low energy limit. Recent striking results relating black hole entropy derived by classical thermodynamics to that derived from a microcanonical ensemble in string theory hint at a deep connection between these theories, but its detailed nature still eludes us. How is it that our isotropic universe of 4 spacetime dimensions emerged from an initial state of a quantum theory, in particular, one likely formulated in more than 4 dimensions?

量子引力的一个关键问题是理解包括引力在内的正确高能理论（例如弦理论）如何在其低能量极限下产生经典相对论。最近将经典热力学得出的黑洞熵与弦理论中的微正则系综联系起来的惊人结果暗示了这些理论之间的深刻联系，但其详细本质仍然让我们困惑。我们的 4 个时空维度的各向同性宇宙是如何从量子理论的初始状态（特别是可能以超过 4 个维度表述的量子理论）中出现的？