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SYAD: Symposium SAMOP Dissertation Prize 2022

SYAD 1: SAMOP Dissertation Prize Symposium

SYAD 1.1: Hauptvortrag

Dienstag, 15. März 2022, 14:00–14:30, Audimax

New insights into the Fermi-Hubbard model in and out-of equilibrium — •Annabelle Bohrdt — Harvard University, Cambridge MA, USA

Understanding the phase diagram of the two-dimensional Fermi-Hubbard model -- and by extension, high temperature superconductivity in the cuprate materials -- poses one of the biggest challenges in condensed matter physics. In this talk, I will show how the recent advances in experiments with cold atoms in optical lattices, naturally suited for quantum simulation of the Fermi-Hubbard model, offer a completely new perspective on this decades old problem. I will present a microscopic description of a single hole in a quantum antiferromagnet -- a first and crucial step to unravel the underlying physics of the enigmatic Hubbard model. In particular, I will discuss numerical as well as experimental results for the interplay of spin and charge degrees of freedom in the dynamics of a single hole. As an outlook, I will demonstrate how the understanding of a single hole yields insights into the finite doping regime and a mechanism for pairing at unprecedentedly high temperatures.