Finite boson and fermion systems under extreme rotation: edge reconstruction and vortex formation

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Abstract

Vortices can form when finite quantal systems are set rotating. 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. For a larger number of fermions, N greater than or similar to 15, the fermion vortices compete and co-exist with (Chamon-Wen) edge-reconstructed ground states, forcing some ground states, as for example the central single vortex, into the spectrum of excited states. Experimentally, the fermion system could, for instance, be electrons in a semiconductor heterostructure, a quantum dot, and the corresponding boson system, a Bose-Einstein condensate in a magneto optical trap.

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Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysik
Originalspråkengelska
Sidor (från-till)2721-2735
TidskriftJournal of Physics B: Atomic, Molecular and Optical Physics
Volym39
Utgåva nummer12
StatusPublished - 2006
PublikationskategoriForskning
Peer review utfördJa