Toward a Theory of Strongly Paired Fermions

报告摘要：It is known that a weak attractive interaction in cold fermionic systems leads to Cooper pairing and hence superconductivity/superfluidity, which can be realized in electronic systems, nuclear matter, and dense quark matter. The application of magnetic field tuned Feshbach resonance in ultracold Fermi gases of alkali-metal atoms, i.e., tuning the interatomic interaction strength, opens a new paradigm to study strongly interacting many-body phenomena. The crossover from Bardeen-Cooper-Schrieffer (BCS) superfluid to Bose-Einstein condensate (BEC) in Fermi gases has now been experimentally explored in great detail, leading to a number of new concepts such as unitary Fermi gas and universal equation of state that bring new insights to better understand other strongly interacting systems in nature, such as quark gluon plasma and neutron star matter. In this talk I will introduce a many-body theoretical description of strongly paired fermions and its application to quasi-two-dimensional strongly interacting Fermi gases.
报告人简介：何联毅，清华大学物理系长聘副教授，哔哩哔哩知名UP主。2004年获清华大学物理学学士，2009年获清华大学物理学博士，2010-2011德国法兰克福大学理论物理研究所博士后，2011-2013德国法兰克福高等研究院博士后，2013-2015美国洛斯阿拉莫斯国家实验室理论部研究助理，2016-2022清华大学物理系助理教授、准聘副教授，2022起任长聘副教授。曾获德国洪堡学者博士后奖学金(2010-2011)、Hermann Kuemmel多体物理早期成就奖(2015)、国家级青年人才计划(2016)。主要研究热密QCD物质和强相互作用冷原子系统的多体理论，迄今发表研究论文约80篇。