Abstract:

The Fermi-Hubbard model describes strongly correlated electrons in solids. Upon doping, it displays a rich phase diagram caused by the interplay of magnetic and kinetic degrees of freedom. This receives special interest for capturing fundamental aspects of high-temperature superconductors, a class of materials that still pose questions to modern research.

The strong interactions of these many-body systems, however, make them notoriously hard to compute on classical computers and a full understanding remains elusive. Quantum simulation can thus be a powerful tool to shed light onto these problems.

In this talk I will introduce the experimental setup and recent results of our quantum simulator, a fermionic quantum-gas microscope based on ultracold atoms in optical lattices. A special focus of the talk lies on the microscopic observation of dopant pairing, a key ingredient for the emergence of superconductivity. By engineering a special ladder geometry, we increase the binding energy and realize a system that displays tightly bound pairs.

Bio:

I studied physics in Heidelberg and Munich and did my PhD in the group of Immanuel Bloch at the Max-Planck-Institute of Quantum Optics in Garching. Recently I started my postdoc in the group of Leticia Tarruell in ICFO.