The many-body physics of nuclei, cold atoms, neutron stars and supernovae

我的研究重点是理解和预测在实验室和宇宙中基于中子和质子之间的强相互作用的强相互作用物质的性质。强相互作用的物理学涵盖了从富含中子的原子核的新结构，到超冷原子和低密度中子物质的普遍特性，再到超新星和中子星的极端现象。我们的重点之一是应用一种强大的方法，称为重整化群，核相互作用。这导致了普遍的低动量相互作用，在少体和多体计算中显示出巨大的希望，并在天体物理学中为轻核到重核和物质的统一描述开辟了新的前沿。我们将发展三核子相互作用的重整化群。拟议中的研究将测试地球和恒星核系统中的低动量相互作用，使用强大的多体方法并开发新的方法。我的研究与实验ISAC项目密切相关，并利用了协同效应。一个里程碑将是在中等质量核中首次计算微观三核子相互作用，我们将系统地研究它们对向富中子核演化的影响以及中子滴线的位置。我们的核物质结果激发了一个程序，从低动量相互作用中推导出一个通用的核能密度泛函，首先应用于超流体间隙。我们将把富中子核和核物质的发展应用于天体物理学：核坍缩超新星和中子星结构/合并的核状态方程；轻核与微球附近的微中子相互作用（最后的微中子散射表面）；并为模拟开发统一的方法和改进的中微子物理输入。一个重要的跨学科部分是我对费米气体共振相互作用的普遍性质的研究。这可以用超冷原子进行研究，并为核系统提供约束和新的见解。我们将探索强相互作用的自旋极化费米气体的性质和三自旋态混合物中的新型三体物理。

My research focuses on understanding and predicting the properties of strongly-interacting matter in the laboratory and the cosmos based on strong interactions between neutrons and protons. The physics of strong interactions spans from new structures in neutron-rich nuclei, universal properties in ultracold atoms and low-density neutron matter, to the extremes reached in supernovae and neutron stars. One of our highlights is the application of a powerful method, called the renormalizaton group, to nuclear interactions. This leads to universal low-momentum interactions that show great promise in few- and many-body calculations and set new frontiers with a unified description of light to heavy nuclei and matter in astrophysics. We will develop the renormalization group for three-nucleon interactions. The proposed research will test low-momentum interactions in nuclear systems on earth and in stars, using powerful many-body methods and developing new ones. My research is strongly connected to and exploits synergies with the experimental ISAC program. One milestone will be the very first calculation with microscopic three-nucleon interactions in medium-mass nuclei, and we will systematically investigate their impact on the evolution to neutron-rich nuclei and the location of the neutron drip line. Our nuclear matter results motivate a program to derive a universal nuclear energy density functional from low-momentum interactions, with first applications to superfluid gaps. We will apply the developments for neutron-rich nuclei and nuclear matter to astrophysics: to the nuclear equation of state for core-collapse supernovae and neutron-star structure/mergers; to light nuclei and neutrino interactions near the neutrinosphere (surface of last neutrino scattering); and to develop a unified approach and improved neutrino physics input for simulations. An important interdisciplinary part is my research on universal properties of Fermi gases with resonant interactions. This can be studied with ultracold atoms, and provides constraints and novel insights to nuclear systems. We will explore the properties of strongly-interacting spin-polarized Fermi gases and novel three-body physics in three-spin-state mixtures.