Controlling the motion of dark solitons by means of periodic potentials: application to Bose-Einstein condensates in optical lattices.
We demonstrate that the motion of dark solitons (DSs) can be controlled by means of periodic potentials. The mechanism is realized in terms of cigar-shaped Bose-Einstein condensates confined in a harmonic magnetic potential, in the presence of an optical lattice (OL). In the case when the OL period is comparable to the width of the DS, we demonstrate that (a) a moving dark soliton can be captured, switching on the OL, and (b) a stationary DS can be dragged by a moving OL.
Theocharis
G
G
Department of Physics, University of Athens, Panepistimiopolis, Zografos, Athens 15784, Greece.
Frantzeskakis
D J
DJ
Carretero-González
R
R
Kevrekidis
P G
PG
Malomed
B A
BA