TY - JOUR
T1 - Cross-symmetric dipolar-matter-wave solitons in double-well chains
AU - Fan, Zhiwei
AU - Shi, Yuhan
AU - Liu, Yan
AU - Pang, Wei
AU - Li, Yongyao
AU - Malomed, Boris A.
N1 - Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/3/31
Y1 - 2017/3/31
N2 - We consider a dipolar Bose-Einstein condensate trapped in an array of two-well systems with an arbitrary orientation 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 modeled by a pair of coupled discrete Gross-Pitaevskii equations, with dipole-dipole self-interactions 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, viz., on-site- and off-site-centered solitons, 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 PT-symmetric version of the system are constructed too, and stability areas are identified for them.
AB - We consider a dipolar Bose-Einstein condensate trapped in an array of two-well systems with an arbitrary orientation 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 modeled by a pair of coupled discrete Gross-Pitaevskii equations, with dipole-dipole self-interactions 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, viz., on-site- and off-site-centered solitons, 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 PT-symmetric version of the system are constructed too, and stability areas are identified for them.
UR - http://www.scopus.com/inward/record.url?scp=85016454828&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.95.032226
DO - 10.1103/PhysRevE.95.032226
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C2 - 28415205
AN - SCOPUS:85016454828
SN - 2470-0045
VL - 95
JO - Physical Review E
JF - Physical Review E
IS - 3
M1 - 032226
ER -