Driven Macroscopic Quantum Tunneling of Ultracold Atoms in Engineered Optical Lattices

Abstract

Coherent 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.

References in corpus (15)

• 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
• Atom-Atom Scattering Under Cylindrical Harmonic Confinement: Numerical and Analytical Studies of the Confinement Induced Resonance
• Nonlinear Tight-Binding Approximation for Bose-Einstein Condensates in a Lattice
• Macroscopic Quantum Tunneling of a Bose-Einstein Condensate with Attractive Interaction
• Enhanced Macroscopic Quantum Tunneling in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ Intrinsic Josephson Junction Stacks
• Tunable Quantum Tunneling of Magnetic Domain Walls
• Spontaneous Symmetry Breaking in Photonic Lattices: Theory and Experiment
• Nonlinear Bloch-wave interaction and Bragg scattering in optically-induced lattices
• Macroscopic quantum tunnelling of Bose-Einstein condensates in a finite potential well
• Complex scaling approach to the decay of Bose-Einstein condensates
• Tunnelling rates for the nonlinear Wannier-Stark problem
• Bistability and macroscopic quantum coherence in a BEC of ^7Li
• Coexistence of Josephson oscillations and novel self-trapping regime in optical waveguide arrays

Cited by in corpus (4)

• Nonlinear Landau-Zener Tunnelling in Coupled Waveguide Arrays
• Extracting Lyapunov exponents from the echo dynamics of Bose-Einstein condensates on a lattice
• Nonlinear Dynamics in Double Square Well Potential
• Control of the symmetry breaking in double-well potentials by the resonant nonlinearity management