Cold fermionic atoms in two-dimensional traps: pairing versus Hund's rule.
The microscopic properties of few interacting cold fermionic atoms confined in a two-dimensional (2D) harmonic trap are studied by numerical diagonalization. For repulsive interactions, a strong shell structure dominates, with Hund's rule acting at its extreme for the midshell configurations. In the attractive case, odd-even oscillations due to pairing occur simultaneously with deformations in the internal structure of the ground states, as seen from pair correlation functions.
Rontani
M
M
CNR-INFM National Research Center S3, Via Campi 213/A, 41100 Modena, Italy. rontani@unimore.it
Armstrong
J R
JR
Yu
Y
Y
Aberg
S
S
Reimann
S M
SM