Vortices and Edge Reconstruction in Small Quantal Systems at High Angular Momenta

Details Vortices and Edge Reconstruction in Small Quantal Systems at High Angular Momenta Vortices and Edge Reconstruction in Small Quantal Systems at High Angular Momenta

2004-12-23

arxiv.org/abs/cond-mat/0412660v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8pages, 10figures

Scientific paper

Vortices can form when finite quantal systems are set to rotate. In the limit of small particle numbers the vortex formation in a harmonically trapped fermion system, with repulsively interacting particles, shows similarities to the corresponding boson system, with vortices entering the rotating cloud for increasing rotation. We show that for a larger number of fermions, $N\gtrsim15$, the fermion vortices compete and co-exist with (Chamon-Wen) edge-reconstructed ground states, forcing some ground states, for instance the central single vortex, into the spectrum of excited states. Experimentally, the fermion system could for instance be a semiconductor heterostructure, a quantum dot, and the corresponding boson system a magneto optical trap (MOT).

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