Feshbach resonance management of Bose-Einstein condensates in optical lattices
Feshbach resonance management of Bose-Einstein condensates in optical lattices
We analyze gap solitons in trapped Bose-Einstein condensates (BECs) in optical lattice potentials under Feshbach resonance management. Starting with an averaged Gross-Pitaevsky equation with a periodic potential, we employ an envelope-wave approximation to derive coupled-mode equations describing the slow BEC dynamics in the first spectral gap of the optical lattice. …