Research on Gravitation and Quantized Fields (Physics)

本研究涉及几个方面的关系 量子理论和引力之间的联系，特别是那些 与理解人类的起源和进化有关， 宇宙 这项工作是一系列调查的一部分， 更好地理解引力对量子系统的影响 和引力的量子性质 具体研究课题 包括：（1）宇宙常数问题， 宇宙学中最基本的未解决的问题 问题就 在可能的动力学机制的背景下研究， 宇宙学“常数”的值衰减。 (2)量子 违反经典能量条件（例如， 负能量密度）及其对引力的影响。 这将研究在何种程度上可以产生异国情调 引力场与量子物质，并避免 经典广义相对论的奇点 (3)界限 量子引力的半经典近似的有效性。 这对于理解早期的历史和 宇宙和指导发展一个更完整的 量子引力理论 (4)量子力学的替代方法 场理论 这是对研究量子的新方法的探索 过程，特别是在重力的存在下。

This research deals with several aspects of the relationship between quantum theory and gravitation, especially those which are relevant to understanding the origin and evolution of the universe. This work is part of a line of enquiry that seeks to better understand the effects of gravitation on quantum systems and the quantum nature of gravity. The specific research topics include: (1) The problem of the cosmological constant, a fundamental, unsolved problem in cosmology. The problem will be studied in the context of possible dynamical mechanism that force the value of the cosmological "constant" to decay. (2) Quantum violations of classical energy conditions (e.g. generation of negative energy densities) and their effects upon gravitation. This will study the extent to which one can produce exotic gravitational fields with quantum matter and avoid the singularities of classical general relativity. (3) The limits of validity of the semiclassical approximation to quantum gravity. This is of importance both for understanding the early history of the universe and for guiding the development of a more complete quantum gravity theory. (4) Alternative approaches to quantum field theory. This is a search for new ways of studying quantum processes, especially in the presence of gravity.