Cold Fermionic Atoms in Two-Dimensional Traps -- Pairing versus Hund's Rule

Details Cold Fermionic Atoms in Two-Dimensional Traps -- Pairing versus Hund's Rule Cold Fermionic Atoms in Two-Dimensional Traps -- Pairing versus Hund's Rule

2008-06-23

arxiv.org/abs/0806.3780v3

Physical Review Letters 102, 060401 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

RevTeX 4.0, 4 pages, 5 colour postscript figures

Scientific paper

10.1103/PhysRevLett.102.060401

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 mid-shell 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.

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