2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/123255Coherent macroscopic tunneling of a Bose-Einstein condensate between two parts of an optical lattice separated by an energy barrier is theoretically investigated. We show that by a pulsewise change of the barrier height, it is possible to switch between tunneling regime and a self-trapped state of the condensate. This property of the system is explained by effectively reducing the dynamics to the nonlinear problem of a particle moving in a double square well potential. The analysis is made for both attractive and repulsive interatomic forces, and it highlights the experimental relevance of our findings.Mesoscale and Nanoscale PhysicsSuperconductivityPattern Formation and SolitonsAtomic Physicstext