Research on time-dependent solutions and application to cosmology in superstring theories

超弦理论中瞬态解及其在宇宙学中的应用研究

基本信息

批准号：
16540250
负责人：
OHTA Nobuyoshi
金额：
$ 2.52万
依托单位：
Kinki University (2006-2007)Osaka University (2004-2005)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

We have carried out research related to quantum gravity and its consequences, which is one of the greatest problems in elementary particle physics and gravity. Since the most promising candidate for such a theory, the superstring, is defined in higher dimensions, extra dimensions must be compactified in order to give a realistic description of our world. In this research, we have investigated time-dependent inflationary solutions systematically to obtain realistic models for our universe in the low-energy effective theory of superstring, and clarified the possibility of describing big-bang singularity quantum mechanically by using supersymmetric time-dependent solutions. We have also clarified some properties of higher-dimensional black holes related to superstring. We have also studied physical applications of these results to cosmology. Our results turn out to be very useful in clarifying the interplay between the fundamental theory of particle physics and cosmology. Our concrete res … More ults are as follows.1. We obtained interesting cosmological solutions systematically in the supergravity as an effective theory of superstring with higher order quantum corrections. These solutions clarify the possibility of explaining inflation at the early universe as well as current accelerating expansion.2. Supersymmetric solutions are one of the rare system in which we can study their quantum properties. We constructed such siolutions in supergravity and showed that they can be used to describe big-bang singularity in the early universe. We have also studied supersymmetric D2-brane system systematically and clarified their physical properties.3. It is known that most of the energy of our universe consists of dark matter and dark energy. We pointed out that it is natural that they interact with each other and obtained observational bound on it.We have also obtained some interesting new results on confinement in QCD by superstring and universality of the entropy-area relation for black holes. Less

我们进行了与量子重力及其后果有关的研究，这是基本粒子物理和重力中最大的问题之一。由于这种理论的最有前途的候选人，因此在更高的维度上定义了SuperString，因此必须压实额外的维度，以便对我们的世界进行现实的描述。在这项研究中，我们系统地研究了时间依赖性的通货膨胀解决方案，以在低能量的有效的超弦乐理论中为我们的宇宙获得现实模型，并阐明了通过使用超对称时间依赖性的解决方案机械地描述大键奇异性量子的可能性。我们还阐明了与SuperString相关的高维黑孔的某些特性。我们还研究了这些结果在宇宙学上的物理应用。事实证明，我们的结果在确定粒子物理学和宇宙学基本理论之间的相互作用方面非常有用。我们的具体res…更多的Ults如下1。我们在超级实力中系统地获得了有趣的宇宙学解决方案，这是具有高阶量子校正的有效superstring理论。这些解决方案阐明了解释早期宇宙和当前加速度扩展的可能性。2。超对称溶液是我们可以研究其量子特性的罕见系统之一。我们在超级重力中构建了这样的措施，并表明它们可以用来描述早期宇宙中的大爆炸奇点。我们还系统地研究了超对称D2-Brane系统并阐明了它们的物理特性3。众所周知，我们宇宙的大部分能量都由暗物质和暗能量组成。我们指出，他们彼此相互作用并获得了观察性的束缚是很自然的。我们还通过SuperString和SuperString和entropy-Araea关系的宇宙在QCD中获得了一些有趣的新结果。较少的

项目成果

期刊论文数量（110）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Holography and D3-branes in Melvin universes

梅尔文宇宙中的全息术和 D3 膜

DOI：
10.1103/physrevd.73.106009
发表时间：
2006-01
期刊：
Physical Review D
影响因子：
5
作者：
Ohta, N;Cai, RG
通讯作者：
Cai, RG

Inflation from M-theory with fourth-order corrections and large extra dimensions

DOI：
10.1016/j.physletb.2004.07.038
发表时间：
2004-05
期刊：
Physics Letters B
影响因子：
4.4
作者：
K. Maeda;N. Ohta
通讯作者：
K. Maeda;N. Ohta

Accelerating Cosmology from Einstein-Gauss-Bonnet Theory with Dilaton

用膨胀子加速爱因斯坦-高斯-博内理论的宇宙学

DOI：
发表时间：
2007
期刊：
影响因子：
0
作者：
Z.K.Guo;N.Ohta;Y.Z.Zhang;太田信義;馬場一晴;太田信義;太田信義;Zong-kuan Guo;太田信義
通讯作者：
太田信義

On the no-ghost theorem in string theory

论弦理论中的无鬼定理

DOI：
发表时间：
2006
期刊：
Progress of Theoretical Physics 116
影响因子：
0
作者：
M.;Wakamatsu;R.G.Cai;K.Akune;Z.K.Guo;T.Ishino;R.G.Cai;R.G.Cai;H.Kodama;K.Maeda;K.Furuuchi
通讯作者：
K.Furuuchi

Entropy Function and Universality of Entropy-Area Relatioil for Small Black Hole

小黑洞熵函数及熵面积关系的普适性