Berry Phase in Strongly Interacting Fermions
Speaker: Jing-Yuan Chen （陈静远） (斯坦福大学)
Time: September 19, 2017 10:00
Abstract: Non-Fermi liquid is a class of states of matter emerged from strongly interacting fermions, characterized by the absence of stable quasiparticle excitation, and hence drastically deviate from our Fermi gas intuition. Many studies on such systems are based on phenomenological propositions; concrete theoretical results are extremely rare and any of them can serve as a long-term anchor of the field. I will present that one particular response property -- the static magnetic response -- can be derived from first principles under very general assumptions. The result is formulated in terms of Berry curvature, which is a concept widely used for non-interacting fermions, but here adopted for strongly interacting fermions.
Brief bio: Jing-Yuan Chen obtained his B.Sc. in Physics and Math from the University of Michigan Ann Arbor in 2011, and his Ph.D. in Physics, advised by Dam Thanh Son, from the University of Chicago in 2016. He is currently a Gordon and Betty Moore Postdoctoral Fellow in Condensed Matter Physics at the Stanford Institute for Theoretical Physics.