Vortices in small Bose or Fermi systems with repulsive interactions

J. Christensson, M. Borgh, M. Koskinen, G. Kavoulakis, M. Manninen, S. M. Reimann

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For rotating Bose-Einstein condensates, the occurrence of vortices has been much discussed in the Gross-Pitaevskii approach. Here, we study vortex formation in finite systems with few particles for weak and repulsive two-body interactions, by numerical diagonalization. Vortex formation is surprisingly similar for both (spinless) bosonic and fermionic particles. Breaking the rotational invariance of the Hamiltonian of the system reveals the vortex patterns. A transformation from a many-fermion to a many-boson state is proposed.

Original languageEnglish
Pages (from-to)161-166
Number of pages6
JournalFew-Body Systems
Issue number1-4
Publication statusPublished - 14 Nov 2008
Externally publishedYes

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