String theory and holography

最雄心勃勃的科学努力之一是用一种描述来概括宇宙的所有运行方式。在上个世纪，朝着这个目标迈出了重要的一步，最终出现了两个著名的范例：描述短距离宇宙的量子力学和描述大距离宇宙的爱因斯坦的广义相对论。弦理论是一种非常庞大的理论，旨在通过一套共同的原理和方程来描述自然界的所有现象，它成功地驯服了量子力学和广义相对论被置于共同框架中时出现的不一致和困惑。这是通过表示自然界中的所有粒子来实现的，通过振动弦的谐和来表示，从而给出了对宇宙中所有物质和所有力的共同描述。尽管弦理论带来了令人兴奋的发展，但如果我们要面对量子引力最深的谜题，并提供实验签名，给出直接的实验验证，前面还有更多的挑战。我的研究主要集中在寻找弦理论的完整-全息-描述，它将允许我们解决量子引力最深的谜题，同时给我们提供新的工具来解决强耦合规范理论，例如量子色动力学，已知但尚未解决的强相互作用理论。

One of the most ambitious scientific endeavors is to summarize in a single description all the workings of the universe. In the last century, important strides were taken towards this goal, culminating with the two celebrated paradigms: Quantum Mechanics describing the universe at short distances and Einstein's theory of General Relativity describing the universe at large distances. String theory, a very ambitous theory aiming to describe by a common set of principles and equations all phenomena in Nature, manages to tame the inconsistencies and puzzles that arise when Quantum Mechanics and General relavity are put into a common framework. This is accomplished by representing all particles in nature  by a harmonic of a vibrating string, thus giving a common description of all matter and all forces in the universe. Despite the exciting developments generated by string theory, further challenges lie ahead if we are to confront the deepest puzzles of quantum gravity and to provide experimental signatures that will give direct experimental verification of the theory. My research primarily focuses on finding a complete -- Holographic -- description of string  theory, that will allow us solve the deepest puzzles of quantum gravity and at the same time give us new tools to solve strongly coupled gauge theories, such as Quantum Chromodynamics, the known but yet unsolved theory of the strong interactions.