SEMINAR ANNOUNCEMENT:“Revisiting superfluidity and shell-effects at the crossroads: experiments, mean-field, and ab initio descriptions.”

George Palkanoglou

TRIUMF, Vancouver, Canada

“Revisiting superfluidity and shell-effects at the crossroads: experiments, mean-field, and ab initio descriptions.”

Abstract

Pairing is a well-known property of fermionic systems and the mechanism driving superfluidity. While prototypical superfluidity in terrestrial superconductors manifests at the thermodynamic limit, the pairing of nucleons in nuclei or of trapped cold atoms, reveals an intricate interplay between superfluidity and shell-effects where open questions remain. In this talk, I will present new theoretical results probing these effects: using a mean-field description I will revisit a decade-old anomaly in the odd-even staggering in experimental nuclear masses appended by new precision mass measurements with TITAN at TRIUMF. I will also present similar investigations in trapped cold atoms using Quantum Monte Carlo and discuss extensions to weakly bound systems. Finally, going beyond conventional pairing, I will discuss a novel recasting of the mean-field description of superfluidity that offers practical advantages.