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Research in String Theory, Supergravity and Cosmology

弦理论、超引力和宇宙学研究

基本信息

批准号：
2013988
负责人：
Timm Wrase
金额：
$ 20万
依托单位：
Lehigh University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2013988&HistoricalAwards=false
关键词：
Research String Theory Supergravity Cosmology

项目摘要

This award funds the research activities of Professor Timm Wrase at Lehigh University.More than a hundred years after Albert Einstein discovered his theory of general relativity, we are still working on unifying it with quantum mechanics, the theory that governs the subatomic world. String theory, the leading candidate in this endeavor, has already provided deep insights into what is and what is not possible in a theory of quantum gravity. Some of these insights, like the requirement that the gravitational force be weaker than the other forces in any theoretically consistent universe, are widely accepted. However, there are also other much more speculative ideas. For example, our universe is filled with a mysterious so-called dark energy that counteracts gravity and pushes galaxies apart. It was recently conjectured that such a dark energy has to become weaker over time. As part of his research, Professor Wrase will study this and other related conjectures that make interesting predictions for our own universe. The goal of these investigations is to provide theoretical predictions that can be compared to on-going and future cosmological observations of dark energy and a period of so-called cosmological inflation that is believed to have taken place during the very early universe. This project is also expected to have significant broader impacts. Professor Wrase will involve graduate students and a postdoc in his research, and thereby provide critical training for junior physicists beginning research in this field. He also intends to give public lectures on the topics of his research.More technically, Professor Wrase will study cosmological applications of string theory such as inflation and dS vacua. There are a variety of related swampland conjectures that need to be better understood and made more precise. For example, the status of dS vacua and large-field inflation in string theory are highly debated. Improving our understanding of existing constructions and/or deriving potential no-go theorems will help us in either putting such conjectures on more solid footing or refuting them. This should help in confronting future cosmological observations with improved theoretical predictions for quantities such as the equation of state of dark energy or the tensor-to-scalar ratio during inflation. Another goal of this project is to improve our understanding of supersymmetry breaking in string theory, in particular by studying non-supersymmetric Dp-branes and their connections to non-linear and misaligned supersymmetry.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这个奖项资助了利哈伊大学的Timm Schiasse教授的研究活动。在阿尔伯特·爱因斯坦发现他的广义相对论一百多年后，我们仍然致力于将它与量子力学统一起来，量子力学是统治亚原子世界的理论。弦理论是这一奋进的主要候选者，它已经为量子引力理论中什么是可能的，什么是不可能的提供了深刻的见解。其中一些见解，比如引力比任何理论上一致的宇宙中的其他力都弱的要求，被广泛接受。然而，也有其他更具投机性的想法。例如，我们的宇宙充满了一种神秘的所谓的暗能量，它抵消了引力并将星系推开。最近有人证实，这种暗能量必须随着时间的推移而变弱。作为他研究的一部分，教授将研究这一点和其他相关的预言，使我们自己的宇宙有趣的预测。这些研究的目标是提供理论预测，可以与正在进行和未来的暗能量宇宙学观测以及被认为在非常早期的宇宙中发生的所谓宇宙膨胀时期进行比较。预计该项目还将产生更广泛的重大影响。教授将涉及研究生和博士后在他的研究，从而为初级物理学家开始在这一领域的研究提供关键的培训。他还打算就他的研究主题进行公开讲座。更技术性地说，他将研究弦理论在宇宙学上的应用，如暴胀和dS真空。有各种相关的沼泽地景观需要更好地理解和更精确。例如，dS真空和大场暴胀在弦理论中的地位备受争议。提高我们对现有结构的理解和/或推导出潜在的不可行定理，将有助于我们将这些理论建立在更坚实的基础上，或者反驳它们。这将有助于未来的宇宙学观测，改进对暗能量状态方程或暴胀期间张量与标量比等量的理论预测。该项目的另一个目标是提高我们对弦理论中超对称破缺的理解，特别是通过研究非超对称DP膜及其与非线性和错位超对称的联系。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。