Eur. Phys. J. D (2014) 68: 142
https://doi.org/10.1140/epjd/e2014-40502-4

Regular Article

Self-localisation of dipolar Bose-Einstein condensates in leaking optical lattices

Key Laboratory of Atomic & Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070, P.R. China

^a e-mail: zhaojincui5951@163.com

Received: 16 August 2013
Received in final form: 20 December 2013
Published online: 5 June 2014

Abstract

We investigate self-localisation of dipolar Bose-Einstein condensates (BECs) in 1D nonlinear lattices via boundary dissipation in a dissipative nonlinear Schrödinger model (DNLS) with nearest-neighbour dipole-dipole interactions (DDI). By including both contact interactions and DDIs, we observe that a rich variety of self-localised modes (i.e., single discrete breathers, moving breathers and multi-breathers) can exist in dipolar systems in optical lattices. Furthermore, we find that DDIs can suppress the formation of single discrete breathers and support the formation of multi-breathers. Our results show that including both contact interactions and DDIs may provide a way to experimentally obtain stationary multi-breathers in optical lattices via boundary dissipations.