权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Supersymmetry and Cosmology

超对称性和宇宙学

基本信息

批准号：
10209206
负责人：
KAWASAKI Masahiro
金额：
$ 4.1万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2001
项目状态：
已结题

项目摘要

We have studied inflationary universe models in the framework of supergravity. We have solved initial value problem in a new inflation model introducing "pre-inflation" which takes place before the new inflation and sets the initial vale through supergravity effects. This "double inflation" model leads to production of primordial black holes or a broken power spectrum of density fluctuations. We have also constructed a chaotic inflation model in supergravity. We have studied baryogenesis in SUSY models and, in particular, studied the dynamics of the Q-balls and Affleck-Dine field and have found that the model parameters are stringently constrained by the existence of the Q-ball.Making use of the fact that the quantum corrections to the gravitational action starts at the fourth order in curvature in 11 dimensional supergravity, we have shown that topological inflation naturally takes place in this theory. We have further shown that a large extra dimension is required in order to reproduce the correct amplitude of the curvature perturbations. We proposed a natural double inflation model in supergravity in amplitude of the curvature perturbations. We proposed a natural double inflation model in supergravity in which appropriate reheating is realized without resorting to higher order terms in Kahler potential, I showed that the observed cosmological constant or dark energy can naturally be explained if we live in one of the perturbative vacuum state in a theory with two or more degenerate vacua. We developed a formalism to reproduce the primordial spectrum of curvature perturbation out of the all-sky map of cosmic microwave background radiation. We can thereby obtain important information on particle physics at the inflation era in the early universe.

我们在超重力的框架下研究了膨胀宇宙模型。我们解决了一个新的通货膨胀模型中的初值问题，该模型引入了“前通货膨胀”，它发生在新的通货膨胀之前，并通过超重力效应来设定初始值。这种“双膨胀”模型会导致原始黑洞的产生或密度起伏的功率谱破裂。我们还建立了一个超重力下的混沌膨胀模型。我们研究了超引力模型中的重子发生，特别是研究了Q球和Affleck-Dine场的动力学，发现Q球的存在严格限制了模型参数的存在。利用11维超引力中引力作用的量子修正从曲率的四阶处开始的事实，我们证明了在该理论中自然地发生了拓扑膨胀。我们进一步证明，为了重现曲率扰动的正确幅度，需要一个很大的额外维度。我们提出了一个曲率摄动幅度的自然双膨胀模型。我们提出了一个超引力下的自然双膨胀模型，在该模型中，不需要借助Kahler势的高阶项就可以实现适当的再热。我证明了如果我们生活在具有两个或多个简并真空的理论中的微扰真空态之一，那么观测到的宇宙学常数或暗能量就可以自然地解释。我们发展了一种形式来从宇宙微波背景辐射的全天图中重现曲率扰动的原始谱。因此，我们可以获得有关宇宙早期膨胀时代的粒子物理的重要信息。