The main goal of the project is to arrive at a fully consistent quantum mechanical description of the evolution of the matter-antimatter asymmetry in the universe

宇宙中物质多于反物质是一个长期存在的宇宙学问题。最近关于非零中微子质量的实验证据增强了人们对“轻生”机制的信心，该机制将轻中微子的特性与宇宙物质-反物质不对称联系起来，是正确的解释。因此，中微子的质量必须满足严格的上限，以符合当前的测量结果，并在未来的实验室实验和观测宇宙学的范围内。轻生理论连接了几个前沿研究领域，即实验和理论中微子物理学，早期宇宙宇宙学和热量子场论。早期宇宙演化过程中物质-反物质不对称产生的最先进的轻生计算依赖于省略潜在重要量子和热力学修正的近似。提出的研究目标是超越这种近似，并达到一个完全一致的量子力学描述。一个多粒子量子系统离开热平衡的时间演化可以用施温格-戴森的形式主义一致地描述。这种形式主义将被系统地研究并应用于早期宇宙宇宙学。该提案的一个补充目标是进一步研究低能物理中纤生机制的现象学含义。这在当前和未来的粒子物理学和中微子实验中尤其重要，这些实验可能会对纤体发生提供有趣的限制。

The preponderance of matter over antimatter in the universe is a long-standing cosmological problem. The recent experimental evidence for non-zero neutrino masses has boosted confidence that the mechanism of "leptogenesis", which relates properties of light neutrinos to the cosmological matter-antimatter asymmetry, is the correct explanation. As a consequence, neutrino masses must satisfy strict upper limits in accord with current measurements and within reach of future laboratory experiments and observational cosmology. The theory of leptogenesis connects several areas of leading-edge research, i.e. experimental and theoretical neutrino physics, early-universe cosmology, and thermal quantum field theory. State-of-the-art leptogenesis calculations of the production of a matter-antimatter asymmetry during the evolution of the early universe rely on approximations where potentially important quantum and thermodynamical corrections are omitted. The goal of the proposed research is to progress beyond this approximation and arrive at a fully consistent quantum mechanical description. The time evolution of a many-particle quantum system away from thermal equilibrium can be consistently described in the Schwinger-Dyson formalism. This formalism will be systematically studied and applied to early-universe cosmology. A complementary goal of the proposal is to further study the phenomenological implications of the leptogenesis mechanism for low-energy physics. This is particularly relevant in view of current and future particle physics and neutrino experiments that may provide interesting constraints on leptogenesis.