TY - JOUR
T1 - Semivortex solitons and their excited states in spin-orbit-coupled binary bosonic condensates
AU - Deng, Haiming
AU - Li, Jinqing
AU - Chen, Zhaopin
AU - Liu, Yaohui
AU - Liu, Dong
AU - Jiang, Chunzhi
AU - Kong, Chao
AU - Malomed, Boris A.
N1 - Publisher Copyright:
© 2024 American Physical Society.
PY - 2024/6
Y1 - 2024/6
N2 - It is known that two-dimensional two-component fundamental solitons of the semivortex (SV) type, with vorticities (s+,s-)=(0,1) in their components, are stable ground states (GSs) in the spin-orbit-coupled (SOC) binary Bose-Einstein condensate with the contact self-attraction acting in both components, in spite of the possibility of the critical collapse in the system. However, excited states (ESs) of the SV solitons, with the vorticity set (s+,s-)=(S+,S++1) and S+=1,2,3,..., are unstable in the same system. We construct ESs of SV solitons in the SOC system with opposite signs of the self-interaction in the two components. The main finding is stability of the ES-SV solitons, with the extra vorticity (at least) up to S+=6. The threshold value of the norm for the onset of the critical collapse, Nthr, in these excited states is higher than the commonly known critical value, Nc≈5.85, associated with the single-component Townes solitons, Nthr increasing with the growth of S+. A velocity interval for stable motion of the GS-SV solitons is found too. The results suggest a solution for the challenging problem of the creation of stable vortex solitons with high topological charges.
AB - It is known that two-dimensional two-component fundamental solitons of the semivortex (SV) type, with vorticities (s+,s-)=(0,1) in their components, are stable ground states (GSs) in the spin-orbit-coupled (SOC) binary Bose-Einstein condensate with the contact self-attraction acting in both components, in spite of the possibility of the critical collapse in the system. However, excited states (ESs) of the SV solitons, with the vorticity set (s+,s-)=(S+,S++1) and S+=1,2,3,..., are unstable in the same system. We construct ESs of SV solitons in the SOC system with opposite signs of the self-interaction in the two components. The main finding is stability of the ES-SV solitons, with the extra vorticity (at least) up to S+=6. The threshold value of the norm for the onset of the critical collapse, Nthr, in these excited states is higher than the commonly known critical value, Nc≈5.85, associated with the single-component Townes solitons, Nthr increasing with the growth of S+. A velocity interval for stable motion of the GS-SV solitons is found too. The results suggest a solution for the challenging problem of the creation of stable vortex solitons with high topological charges.
UR - http://www.scopus.com/inward/record.url?scp=85195395974&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.109.064201
DO - 10.1103/PhysRevE.109.064201
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C2 - 39021016
AN - SCOPUS:85195395974
SN - 2470-0045
VL - 109
JO - Physical Review E
JF - Physical Review E
IS - 6
M1 - 064201
ER -