# Cross-symmetric dipolar-matter-wave solitons in double-well chains

Zhiwei Fan, Yuhan Shi, Yan Liu, Wei Pang, Yongyao Li, Boris A. Malomed

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

## Abstract

We consider a dipolar Bose-Einstein condensate trapped in an array of two-well systems with an arbitrary orientations of the dipoles relative to the system's axis. The system can be built as a chain of local traps sliced into two parallel lattices by a repelling laser sheet. It is modelled by a pair of coupled discrete Gross-Pitaevskii equations, with dipole-dipole self- and cross-interactions. When the dipoles are not polarized perpendicular or parallel to the lattice, the cross-interaction is asymmetric, replacing the familiar symmetric two-component discrete solitons by two new species of cross-symmetric ones, on-site- and off-site-centered, which are strongly affected by the orientation of the dipoles and separation between the parallel lattices. A very narrow region of intermediate asymmetric discrete solitons is found at the boundary between the on- and off-site families. Two different types of solitons in the $\mathcal{PT}$%-symmetric version of the system are constructed too, and stability areas are identified for them.
Original language English Physical Review E https://doi.org/10.1103/PhysRevE.95.032226 Published - 24 Nov 2016

## Keywords

• cond-mat.quant-gas
• nlin.PS