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

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

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9 Citations (SciVal)


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 languageEnglish
JournalPhysical Review E
Publication statusPublished - 24 Nov 2016

Bibliographical note

13 pages, 12 figures, 72 References, Physical Review E, in press


  • cond-mat.quant-gas
  • nlin.PS


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