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Ground State Phases of Spin-Orbit Coupled Spin-1 Dipolar Bose-Einstein Condensates

Qiang Zhao, Hongjing Bi

International Journal of Theoretical PhysicsJun 30, 20212 citations

Meron Ground State of Rashba Spin-Orbit-Coupled Dipolar Bosons

Ryan Wilson, Brandon Anderson, Charles W. Clark

We study the effects of dipolar interactions on a Bose-Einstein condensate with synthetically generated Rashba spin-orbit coupling. The dipolar interaction we consider includes terms that couple spin and orbital angular momentum in a way perfectly congruent with the single-particle Rashba coupling. We show that this internal spin-orbit coupling plays a crucial role in the rich ground-state phase diagram of the trapped condensate. In particular, we predict the emergence of a thermodynamically stable ground state with a meron spin configuration.We study the effects of dipolar interactions on a Bose-Einstein condensate with synthetically generated Rashba spin-orbit coupling. The dipolar interaction we consider includes terms that couple spin and orbital angular momentum in a way perfectly congruent with the single-particle Rashba coupling. We show that this internal spin-orbit coupling plays a crucial role in the rich ground-state phase diagram of the trapped condensate. In particular, we predict the emergence of a thermodynamically stable ground state with a meron spin configuration.

arXiv:1306.6610Physical Review LettersOct 30, 201386 citations

The ground states of spin–orbit coupled Bose–Einstein condensates in spin-dependent potential

Congying Ma, Jingjing Jin, Haoran Sun +2 more

Annals of PhysicsMay 15, 20250 citations

Ground States of Dipolar Spin–Orbit-Coupled Bose–Einstein Condensates in a Toroidal Trap

Hui Yang, Qingbo Wang, Linghua Wen

We investigate the ground-state structures of dipolar spin-orbit-coupled Bose-Einstein condensates in a toroidal trap. Combined effects of dipole-dipole interaction (DDI) and spin-orbit coupling (SOC) on the ground states of the system are discussed. A ground-state phase diagram is obtained as a function of the SOC and DDI strengths. As two new degrees of freedom, the DDI and SOC can be used to obtain the desired ground-state phases and to control the phase transition between various ground states. In particular, the system displays exotic topological structures and spin textures, such as half-quantum vortex, vortex string, vortex necklace, complex vortex lattice including giant vortex and hidden antivortex chains, different skyrmions, meron (half-skyrmion)-antimeron (half-antiskyrmion) necklace, and composite meron-antimeron lattice.We investigate the ground-state structures of dipolar spin-orbit-coupled Bose-Einstein condensates in a toroidal trap. Combined effects of dipole-dipole interaction (DDI) and spin-orbit coupling (SOC) on the ground states of the system are discussed. A ground-state phase diagram is obtained as a function of the SOC and DDI strengths. As two new degrees of freedom, the DDI and SOC can be used to obtain the desired ground-state phases and to control the phase transition between various ground states. In particular, the system displays exotic topological structures and spin textures, such as half-quantum vortex, vortex string, vortex necklace, complex vortex lattice including giant vortex and hidden antivortex chains, different skyrmions, meron (half-skyrmion)-antimeron (half-antiskyrmion) necklace, and composite meron-antimeron lattice.

arXiv:1911.03303Journal of the Physical Society of JapanMay 8, 20195 citations

Tunable ground-state solitons in spin–orbit coupling Bose–Einstein condensates in the presence of optical lattices

Huafeng Zhang, Fang Chen, Chunchao Yu +2 more

Properties of the ground-state solitons, which exist in the spin–orbit coupling (SOC) Bose–Einstein condensates (BEC) in the presence of optical lattices, are presented. Results show that several system parameters, such as SOC strength, lattice depth, and lattice frequency, have important influences on properties of ground state solitons in SOC BEC. By controlling these parameters, structure and spin polarization of the ground-state solitons can be effectively tuned, so manipulation of atoms may be realized.Properties of the ground-state solitons, which exist in the spin–orbit coupling (SOC) Bose–Einstein condensates (BEC) in the presence of optical lattices, are presented. Results show that several system parameters, such as SOC strength, lattice depth, and lattice frequency, have important influences on properties of ground state solitons in SOC BEC. By controlling these parameters, structure and spin polarization of the ground-state solitons can be effectively tuned, so manipulation of atoms may be realized.

Chinese Physics BAug 1, 20177 citations

Excitations in a Dipolar Bose–Einstein Condensate

Jing-Min Hou, Tiantao Zhao, Lijie Zhang

International Journal of Theoretical PhysicsOct 2, 20071 citation

Ground-state properties of dipolar Bose–Einstein condensates with spin–orbit coupling and quantum fluctuations

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