Quantum Field Theory and Cosmology

量子场论和宇宙学

• 批准号: 0653085
• 负责人: Richard Woodard
• 金额: $ 6万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0653085&HistoricalAwards=false
• 关键词: Quantum; Field; Theory; Cosmology

The PI will study a class of quantum effects which take place during the phase of accelerated expansion known as "primordial inflation." These effects do many fascinating things such as changing the masses and field strengths of fundamental particles, and changing the rate at which the universe expands. An important property of these effects is that they grow with time until conventional approximation techniques break down. The PI will complete the development of a new technique with which this class of quantum effects can be evolved to arbitrarily late times. The work will involve reciprocal visits to collaborate with Professor Nikolaos Tsamis (University of Crete, Greece) and Professor Tomislav Prokopec (University of Utrecht, The Netherlands). Important projects will also involve the PI's graduate students: Miss Shun-Pei Miao and Mr.Emre Kahya.Some of these effects may give rise to currently observable consequences such as distortions in the spectrum of primordial perturbations, anomalously large populations of very long wavelength particles, and modifications of the gravitational force law. It seems entirely possible that certain of these effects are even dominating the current large scale evolution of the universe. In addition to deciding these issues, this project will lead to solid advances in quantum field theory on an expanding universe.

PI将研究一类量子效应，这种效应发生在加速膨胀阶段，被称为“原始膨胀”。这些效应做了许多令人着迷的事情，比如改变基本粒子的质量和场强，改变宇宙的膨胀速度。这些效应的一个重要性质是它们随着时间的推移而增长，直到传统的近似技术被打破。PI将完成一项新技术的开发，利用该技术，这类量子效应可以进化到任意晚的时间。这项工作将包括互访，以便与Nikolaos Tsamis教授(希腊克里特岛大学)和Tomislav Prokopec教授(荷兰乌得勒支大学)合作。重要的项目还将涉及国际和平研究所的研究生苗顺培女士和埃姆雷·凯哈先生。其中一些效应可能会引起目前可观察到的后果，如原始微扰光谱的扭曲，极长波长粒子的异常大群，以及万有引力定律的修改。似乎完全有可能，其中某些效应甚至主导着当前宇宙的大规模演化。除了决定这些问题外，这个项目还将导致在不断膨胀的宇宙中量子场理论的坚实进展。