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Ground state properties of a three-site Bose-Fermi ring with a small number of atoms | | Santiago F. Caballero-Benitez
; Elena A. Ostrovskaya
; | | Date: |
23 Nov 2010 | | Abstract: | We investigate a three-site ring system with a small number of quantum
degenerate bosons and fermions. By means of the exact diagonalization of the
Bose-Fermi-Hubbard Hamiltonian, we show that the symmetry of the ground state
configuration is a function of both the boson-boson and the inter-species
interaction in the system. The phase diagram of the system, constructed by
computing the exact two-body spatial correlations, reveals nontrivial
insulating phases that exist even in the strong bosonic tunneling limit and for
incommensurate filling of bosons. These insulating phases are due to the
inter-species interactions in the system and are not necessarily accompanied by
the suppression of the particle number fluctuations. | | Source: | arXiv, 1011.5002 | | Services: | Forum | Review | PDF | Favorites | |
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