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cond-mat.mes-hall2005★ 7 cited
An algebraic approach to the study of weakly excited states for a condensate in a ring geometry
P. Buonsante, R. Franco, V. Penna
We determine the low-energy spectrum and the eigenstates for a two-bosonic mode nonlinear model by applying the Inönü-Wigner contraction method to the Hamiltonian algebra. This mod…
cond-mat.mes-hall2005
Hubbard-like Hamiltonian for ultracold atoms in a 1D optical lattice
Francesco Massel, Vittorio Penna
Based on the standard many-fermion field theory, the authors construct models describing ultracold fermions in a 1D optical lattices by implementing a mode expansion of the fermion…