Density structures and giant vortex in spin-orbit coupled Bose-Einstein condensates with the harmonic-plus-radial potential

Pan, Ling; Wu, Qing; Zhu, Qing-Li; Liu, Yongjun

doi:10.1016/j.physleta.2020.126430

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…For the thermodynamic properties of condensates, the specific heat, transition temperature and condensation fraction of interacting Bose gases are also modified by anharmonic potential [27]. On the other hand, after the realization of SO coupled BECs [3], the SO coupling breaks the Galilean invariance of the system and regulates the collapse of the condensates [46], and the anharmonicity of external potential can induce novel vortex structures [47][48][49] and topological defects [21] in the rotating condensates such as skyrmion, meron cluster, skyrmion string and various skyrmion lattices [50]. Similar phenomena occurs in rotating dipolar condensates due to anharmonic trap [30].…”

Section: Introductionmentioning

confidence: 99%

Anharmonicity-induced phase transition of spin–orbit coupled Bose–Einstein condensates

Zhang¹,

Chen²

2023

J. Phys. B: At. Mol. Opt. Phys.

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In the mean-field framework, by variational analysis and numerical simulation, we investigate the effect of anharmonic trap and atomic interaction on the ground-state phases of a spin-orbit (SO) coupled Bose-Einstein condensates (BECs) in the harmonic plus quartic potential. Then, the Gaussian wave function is selected to predict the analytical conditions of the phase transition boundary of the SO coupled BECs by using the variational method. We found that the anharmonicity of the external potential induces the SO coupled BECs to undergo a phase transition between the zero-momentum phase and plane-wave phase, which is more pronounced in the cases of weak harmonic potential or strong interspecies interaction. Since the potential energy of the system modified by anharmonicity competes with other energies of the system, the anharmonicity changes the critical SO coupling strength and Raman coupling strength when the phase transition occurs. At the same time, the critical anharmonic coefficients are also affected by interspecies interaction and harmonic potential. Finally, the correctness of the theoretical results is verified by the numerical simulation of the Gross-Pitaevskii (GP) equation.

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Section: Introductionmentioning

confidence: 99%

Anharmonicity-induced phase transition of spin–orbit coupled Bose–Einstein condensates

Zhang¹,

Chen²

2023

J. Phys. B: At. Mol. Opt. Phys.

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“…[33][34][35][36] Recently, spin-orbit coupled spinor BECs in the different periodic potentials, like the toroidal trap, spin-dependent periodic potential and radially-periodic potential are investigated, which results in many exotic ground-state phases and solitons. [37][38][39][40][41][42][43][44][45][46] In this paper, we consider 2D spin-orbit coupled spin-1 BECs in two types of radially-periodic potentials, i.e., spinindependent and spin-dependent radially-periodic potentials. For the BECs in a spin-independent radially-periodic potential, the density of each component exhibits the periodic density modulation along the azimuthal direction, which realizes the necklacelike state in the ferromagnetic BECs.…”

Section: Introductionmentioning

confidence: 99%

Spinor F = 1 Bose-Einstein condensates loaded in two types of radially-periodic potentials with spin-orbit coupling*

Wang¹,

Li²,

Tang³

et al. 2021

Chinese Phys. B

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We consider two-dimensional spinor F = 1 Bose-Einstein condensates in two types of radially-periodic potentials with spin-orbit coupling, i.e., spin-independent and spin-dependent radially-periodic potentials. For the Bose-Einstein condensates in a spin-independent radially-periodic potential, the density of each component exhibits the periodic density modulation along the azimuthal direction, which realizes the necklacelike state in the ferromagnetic Bose-Einstein condensates. As the spin-exchange interaction increases, the necklacelike state gradually transition to the plane wave phase for the antiferromagnetic Bose-Einstein condensates with larger spin-orbit coupling. The competition of the spin-dependent radially-periodic potential, spin-orbit coupling, and spin-exchange interaction gives rise to the exotic ground-state phases when the Bose-Einstein condensates in a spin-dependent radially-periodic potential.

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Effects of Higher Order Interaction on Vortex Formation in Bose-Einstein Condensates

Zhao

2021

Int J Theor Phys

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Density structures and giant vortex in spin-orbit coupled Bose-Einstein condensates with the harmonic-plus-radial potential

Cited by 4 publications

References 31 publications

Anharmonicity-induced phase transition of spin–orbit coupled Bose–Einstein condensates

Anharmonicity-induced phase transition of spin–orbit coupled Bose–Einstein condensates

Spinor F = 1 Bose-Einstein condensates loaded in two types of radially-periodic potentials with spin-orbit coupling*

Effects of Higher Order Interaction on Vortex Formation in Bose-Einstein Condensates

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