Driven Macroscopic Quantum Tunneling of Ultracold Atoms in Engineered Optical Lattices
Mesoscale and Nanoscale Physics
2007-05-23 v1 Superconductivity
Pattern Formation and Solitons
Atomic Physics
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.
Keywords
Cite
@article{arxiv.cond-mat/0610014,
title = {Driven Macroscopic Quantum Tunneling of Ultracold Atoms in Engineered Optical Lattices},
author = {Ramaz Khomeriki and Stefano Ruffo and Sandro Wimberger},
journal= {arXiv preprint arXiv:cond-mat/0610014},
year = {2007}
}