Topics in Many-Body Theory

9870597贝里茨这是一项理论研究补助金，目的是加强目前对极低温度下的多电子系统，特别是对这些系统中的相变和其他集体现象的了解。这项研究的一个特别目标是进一步发展和应用一种有效的场论，允许在存在杂质的情况下对电子系统进行系统处理。所采用的方法包括一般场论技术、重整化群和多体微扰理论。与这项工作相关的具体系统包括含杂质的磁体、超导体和掺杂半导体。这是一项理论研究资助，目的是加强目前对极低温度下的多电子系统的了解，特别是对这些系统中的相变和其他集体现象的了解。这项研究的一个特别目标是进一步发展和应用一种有效的场论，允许在存在杂质的情况下对电子系统进行系统处理。所采用的方法包括一般场论技术、重整化群和多体微扰理论。与这项工作相关的具体系统包括含杂质的磁体、超导体和掺杂半导体。***

9870597 Belitz This is a theoretical research grant with the objective to enhance current understanding of many-electron systems at very low temperatures, and especially of phase transitions and other collective phenomena in these systems. A particular objective of the research is to further develop and apply an effective field theory that allows a systematic treatment of electronic systems in the presence of impurities. The methods employed include general field theoretic techniques, the renormalization group, and many- body perturbation theory. Specific systems for which this work is relevant include magnets with impurities, superconductors, and doped semiconductors. %%% This is a theoretical research grant with the objective to enhance current understanding of many-electron systems at very low temperatures, and especially of phase transitions and other collective phenomena in these systems. A particular objective of the research is to further develop and apply an effective field theory that allows a systematic treatment of electronic systems in the presence of impurities. The methods employed include general field theoretic techniques, the renormalization group, and many- body perturbation theory. Specific systems for which this work is relevant include magnets with impurities, superconductors, and doped semiconductors. ***