Starts 8 Apr 2026 16:00
Ends 8 Apr 2026 17:00
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JOINT ICTP-SISSA-UNITS Seminar by Susanne Reffert - The Large Charge Expansion for Relativistic and Non-relativistic Physics
Hybrid
Leonardo Building - Luigi Stasi Seminar Room and Via Zoom
Abstract
The large-charge expansion is a powerful approach for analytically accessing strongly-coupled models at or near criticality. We focus on a sector of fixed and large global charge where it is possible to express observables as an expansion in inverse powers of the charge.
I will first introduce the approach using the simplest relativistic case, namely the O(2) model. Then I will discuss how to apply the large-charge expansion to non-relativistic models which is relevant for the study of ultracold Fermi gases and nuclear physics.
The large-charge expansion is a powerful approach for analytically accessing strongly-coupled models at or near criticality. We focus on a sector of fixed and large global charge where it is possible to express observables as an expansion in inverse powers of the charge.
I will first introduce the approach using the simplest relativistic case, namely the O(2) model. Then I will discuss how to apply the large-charge expansion to non-relativistic models which is relevant for the study of ultracold Fermi gases and nuclear physics.
Link to Zoom Registration
https://zoom.us/meeting/register/XkIFBn9fSsqyj1vbDMrjwg
https://zoom.us/meeting/register/XkIFBn9fSsqyj1vbDMrjwg