Physics and Astronomy Colloquium — Dr. Artur Widera

About the event

“Shaping Quantum Matter in Time: Floquet Engineering of Feshbach Resonances”

Understanding and controlling interactions is at the heart of modern quantum physics. Ultracold gases provide a unique playground for this, where magnetic Feshbach resonances allow us to tune how atoms interact. In this talk, I will introduce the basic ideas of laser cooling and quantum gases, and explain how Feshbach resonances work as a powerful tool to study collective quantum phenomena such as superfluidity and the BEC–BCS crossover. Building on this foundation, I will show how periodic driving – known as Floquet engineering, the time-analogue of Bloch’s theorem in solid-state physics – enables us to create and control entirely new resonances. Using ultracold lithium atoms, we realize Floquet-engineered Feshbach resonances through strong magnetic field modulation. The talk will connect fundamental concepts with cutting-edge experiments, providing both an accessible introduction and a glimpse into the frontiers of quantum engineering.

This is a remote talk.  Zoom information: Meeting ID: 965 8240 9398• Passcode: physastro