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Article overview
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Robustness of discrete semifluxons in closed Bose-Hubbard chains | A. Gallemí
; M. Guilleumas
; J. Martorell
; R. Mayol
; A. Polls
; B. Juliá-Díaz
; | Date: |
Mon, 2 May 2016 12:35:38 GMT (1813kb,D) | Abstract: | We present the properties of the ground state and low-energy excitations of
Bose-Hubbard chains with a geometry that varies from open to closed and with a
tunable twisted link. In the vicinity of the symmetric $pi-$flux case the
system behaves as an interacting gas of discrete semifluxons for finite chains
and interactions in the Josephson regime. The energy spectrum of the system is
studied by direct diagonalization and by solving the corresponding
Bogoliubov--de Gennes equations. The atom-atom interactions are found to
enhance the presence of strongly correlated macroscopic superpositions of
semifluxons. | Source: | arXiv, 1605.0458 | Services: | Forum | Review | PDF | Favorites |
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