This seminar will be held in Jadwin PCTS 407. Prof. Greiner will deliver the seminar via zoom.

Title: Quantum Simulation of the unknown: Emergent Fermi-Hubbard Physics at Ultralow Temperatures

Abstract: What happens when quantum simulations get cold enough to surprise us? Quantum simulations have served as impressive proof-of-principle demonstrations— creating a wide range of many-body quantum phases. Temperatures so far, however, were too high to truly get into uncharted territory, where we can address open questions on quantum materials such as cuprate superconductors. I will present a recent breakthrough in which we show a several-fold temperature reduction in an atomic Hubbard system, bringing quantum simulations into a regime of emergent low-temperature phenomena where the physics is not well understood theoretically. We achieve this by adiabatically transforming a low-entropy product state of ~300 atoms into a correlated final state. Using a quantum gas microscope, we report the first signs of novel physics appearing in this system upon cooling, including a line of thermodynamic anomalies separating the low-doping from high-doping regimes, the pseudo gap state, and a region of enhanced rotational symmetry breaking that may indicate a state of fluctuating stripes. This work signals the emergence of novel physics at low temperatures in the Hubbard model, and directly demonstrates the utility of quantum simulation in addressing open problems in correlated electron physics

A light lunch will be served outside of Jadwin PCTS 407 at noon.