Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-09-30
Europhys. Lett. v.77, 40005 (2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1209/0295-5075/77/40005
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.
Khomeriki Ramaz
Ruffo Stefano
Wimberger Sandro
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