TY - JOUR

T1 - Dragging spin-orbit-coupled solitons by a moving optical lattice

AU - Sakaguchi, Hidetsugu

AU - Hirano, Fumihide

AU - Malomed, Boris A.

N1 - Publisher Copyright:
© 2022 IOP Publishing Ltd.

PY - 2021/12/22

Y1 - 2021/12/22

N2 - It is known that the interplay of the spin-orbit-coupling (SOC) and mean-field self-attraction creates stable two-dimensional (2D) solitons (ground states) in spinor Bose-Einstein condensates. However, SOC destroys the system's Galilean invariance, therefore moving solitons exist only in a narrow interval of velocities, outside of which the solitons suffer delocalization. We demonstrate that the application of a relatively weak moving optical lattice (OL), with the 2D or quasi-1D structure, makes it possible to greatly expand the velocity interval for stable motion of the solitons. The stability domain in the system's parameter space is identified by means of numerical methods. In particular, the quasi-1D OL produces a stronger stabilizing effect than its full 2D counterpart. Some features of the domain are explained analytically.

AB - It is known that the interplay of the spin-orbit-coupling (SOC) and mean-field self-attraction creates stable two-dimensional (2D) solitons (ground states) in spinor Bose-Einstein condensates. However, SOC destroys the system's Galilean invariance, therefore moving solitons exist only in a narrow interval of velocities, outside of which the solitons suffer delocalization. We demonstrate that the application of a relatively weak moving optical lattice (OL), with the 2D or quasi-1D structure, makes it possible to greatly expand the velocity interval for stable motion of the solitons. The stability domain in the system's parameter space is identified by means of numerical methods. In particular, the quasi-1D OL produces a stronger stabilizing effect than its full 2D counterpart. Some features of the domain are explained analytically.

KW - Bose-Einstein condensates

KW - moving optical lattice

KW - soliton

KW - spin-orbit coupling

UR - http://www.scopus.com/inward/record.url?scp=85125736373&partnerID=8YFLogxK

U2 - 10.1088/1361-6455/ac461d

DO - 10.1088/1361-6455/ac461d

M3 - מאמר

AN - SCOPUS:85125736373

VL - 54

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

SN - 0953-4075

IS - 24

M1 - 245301

ER -