A discrete nonlinear lattice model without linear hopping is derived for BECs in quasi-periodic potentials, yielding stable breather solutions (dimers) for negative scattering lengths.
Modugno, Exponential localization in one-dimension al quasi-periodic optical lattices, New J
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Dimers and discrete breathers in Bose-Einstein condensates in a quasi-periodic potential
A discrete nonlinear lattice model without linear hopping is derived for BECs in quasi-periodic potentials, yielding stable breather solutions (dimers) for negative scattering lengths.