Exploring the shell structure of trapped superfluid gases

Ammar A. Kirmani, Khandker Quader, Maxim Dzero

K. Levin, Qijin Chen

Georgios Palkanoglou, R. Curry, S. Gandolfi

We provide quantum Monte Carlo calculations of a two-component Fermi system interacting with an attractive interaction confined in harmonic traps. We investigate the role of the interaction's scattering length and effective range and show its important role in modifying shell effects in the structure of these systems. We show that in the strongly interacting regime, where the scattering length is large, the dominant role to shell effects is due to the effective range. These conclusions are very relevant for nuclear physics, in particular for neutron-rich systems, and open the way to perform new atomic experiments that can help to explain the disappearance of shell-effects in nuclei.

F. Dalfovo, S. Giorgini, Лев П. Питаевский +1 more

Georg M. Bruun, Charles W. Clark

We investigate theoretically the quasiparticle properties of a trapped gas of fermionic atoms in both the normal and the superfluid phases. Our analysis, which accounts for the shell structure of the normal phase spectrum, shows that the single-particle response of the gas to a modulation of the trapping frequency should indicate the onset of superfluidity. The results are discussed in the context of current experiments on trapped Fermi gases.

E. R. F. Ramos, M. A. Caracanhas, R. P. Teles +2 more