2017/11/30 by Chunqing Huang, Yuebo Ye, Shimei Liu +5
Physics and Astronomy · #Angular momentum #Atomic physics #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Dipole #Excited state #Field (mathematics) #Nonlinear Photonic Systems #Physics #Quantum mechanics #Spin (aerodynamics) #Strong Light-Matter Interactions #cond-mat.quant-gas #nlin.PS #physics.optics
paper · pdf · doi:10.1103/physreva.97.013636
published as Phys. Rev. A 97, 013636 (2018) · 8 pages, 3 figures, and 73 references, published on Physical Review A 97, 013636 (2018)
openalex created_date 2017/11/17 · openalex publication_date 2018/01/30 · arxiv created 2018/01/31 · arxiv updated 2018/02/07 · openalex updated_date 2026/08/05
It was recently found that excited states of semivortex and mixed-mode solitons are unstable in spin-orbit-coupled Bose-Einstein condensates (BECs) with contact interactions. We demonstrate a possibility to stabilize such excited states in a setting based on repulsive dipole-dipole interactions induced by a polarizing field, oriented perpendicular to the plane in which the dipolar BEC is trapped. The strength of the field is assumed to grow in the radial direction \ensuremath∼r4. Excited states of semivortex solitons have vorticities S and S+1 in their two components, each being an eigenstate of the angular momentum. They are fully stable up to S=5. The excited state of mixed-mode solitons feature interweaving necklace structures with opposite fractional values of the angular momentum in the two components. They are stable if they are built of dominant angular harmonics \ifmmode±\else\textpm\fiS, with S\ensuremath≤4. The characteristics and stability of these two types of previously unknown higher-order solitons are systematically analyzed. Their characteristic size is \ensuremath∼10\phantom\rule0.16em0ex\ensuremathμm, with the number of atoms \ensuremath\lesssim105.