Bright solitons and self-trapping with a Bose-Einstein condensate of atoms in driven tilted optical lattices
Year: 2010
Type: article
Abstract: We discuss a method for creating bright matter solitons by loading a Bose-Einstein condensate of atoms in a driven tilted optical lattice. It is shown that one can realize the self-focusing regime for the wave-packet dynamics by properly adjusting the phase of the driving field with respect to the phase of Bloch oscillations. If atom-atom interactions are larger than some critical value ${g}_{\mathrm{min}}$, this self-focusing regime is followed by the formation of bright solitons. Increasing the interactions above another critical value ${g}_{\mathrm{max}}$ makes this process unstable. Instead of soliton formation one now meets the phenomenon of incoherent self-trapping. In this regime a fraction of atoms is trapped in incoherent localized wave packets, while the remaining atoms spread ballistically.
Source: Physical Review A
Author: Andrey R. Kolovsky
Institutions: Institute of Physics, Siberian Federal University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1505044098