String Theory Cosmology

弦论宇宙学

• 批准号: 0653361
• 负责人: Jose Juan Blanco-Pillado
• 金额: $ 6万
• 依托单位: Tufts University
• 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: 2007-08-15 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0653361&HistoricalAwards=false
• 关键词: String; Theory; Cosmology

This proposal will explore how one can find a natural way to embed a period ofcosmological inflation within recently proposed string theory compactificationmechanisms. The first part of the research will consider a version of modular inflationcalled racetrack inflation developed by the PI and his collaborators. Modular inflationuses the potentials generated for the moduli fields that occur in string theorycompactifications as the source of the negative pressure required for the inflationaryperiod. In this picture the mechanism for reheating will be studied and the generationof fluctuations in the Cosmic Microwave background due to iso-curvature perturbations.The PI will also investigate other typed of inflation that can occur in string theorycompactifications. The second aspect of the proposal will be a detailed study ofD-Brane inflation. In this picture the scalar field responsible for inflation parameterizesthe position of a brane along the internal manifold. One possible consequence of thispicture is that during inflation there is brane-antibrane annihilation which could lead tothe production of cosmic strings which have observable cosmological effects.The broader implications of this proposal are that If string theory can be directly verified(or falsified) by measurement of cosmological parameters this would be very important.The PI intends to create a web page for the general public explaining the main results ofhis work. He also intends to get involved with Physics Theory-Net and give lectures atlocal high schools.

该提案将探讨如何找到一种自然的方式来嵌入最近提出的弦理论紧凑型机制之内的术期通胀。研究的第一部分将考虑PI及其合作者开发的模块化通货膨胀赛车通货膨胀的版本。模块化通货膨胀率是针对弦理论结合中发生的模量场产生的电位，作为通货膨胀疗法所需的负压的来源。在这张照片中，将研究重新加热的机制，并因ISO呈扰动而引起的宇宙微波背景中的波动产生。该提案的第二个方面将是对民主通货膨胀的详细研究。在这张照片中，负责沿内部歧管的勃雷族的通货膨胀参数位置的标量场。本规定的一个可能的后果是，在通货膨胀期间，有抗抗抗素的歼灭，可能会导致宇宙条件的生产，这些宇宙弦具有可观察到的宇宙学效果。该提议的更广泛的含义是，如果可以通过测量宇宙参数来直接验证（或伪造），那么这将非常重要。这将非常重要。他还打算参与物理理论网络，并进行讲座的地理高中。