Dynamics of Bose-Einstein condensates in a one-dimensional optical lattice with double-well potential

Abstract

We study dynamical behaviors of the weakly interacting Bose-Einstein condensate in the one-dimensional optical lattice with an overall double-well potential by solving the time-dependent Gross-Pitaevskii equation. It is observed that the double-well potential dominates the dynamics of such a system even if the lattice depth is several times larger than the height of the double-well potential. This result suggests that the condensate flows without resistance in the periodic lattice just like the case of a single particle moving in periodic potentials. Nevertheless, the effective mass of atoms is increased, which can be experimentally verified since it is connected to the Josephson oscillation frequency. Moreover, the periodic lattice enhances the nonlinearity of the double-well condensate, making the condensate more "self-trapped" in the $\pi$-mode self-trapping regime.

arXiv comment5 pages, 7 figures

References in corpus (13)

• Direct Observation of Tunneling and Nonlinear Self-Trapping in a single Bosonic Josephson Junction
• Quantum Coherent Atomic Tunneling between Two Trapped Bose-Einstein Condensates
• Josephson Junction Arrays with Bose-Einstein Condensates
• Bloch oscillations and mean-field effects of Bose-Einstein condensates in 1-D optical lattices
• Superfluid and Dissipative Dynamics of a Bose-Einstein Condensate in a Periodic Optical Potential
• Josephson effect between trapped Bose-Einstein condensates
• Condensates beyond mean field theory: quantum backreaction as decoherence
• Josephson effects in dilute Bose-Einstein condensates
• Bose-Einstein condensate in a double-well potential as an open quantum system
• Nonequilibrium Josephson oscillations in Bose-Einstein condensates without dissipation
• Weakly linked binary mixtures of F=1 87-Rb Bose-Einstein condensates
• Dissipation effect in the double-well Bose-Einstein Condensate
• Superfluid-Mott-Insulator Transition in a One-Dimensional Optical Lattice with Double-Well Potentials

Cited by in corpus (2)

• Phase Coherence and Fragmentation of Two-Component Bose-Einstein Condensates Loaded in State-Dependent Optical Lattices
• Interference-induced suppression of particle emission from a Bose-Einstein condensate in lattice with time-periodic modulations