Moving bright solitons in a pseudo-spin polarization Bose–Einstein condensate

Xu, T.F.; Zhang, Yufeng; Xu, Lei-Chao; Li, Zai-Dong

doi:10.1088/1674-1056/26/10/100304

Cited by 9 publications

(3 citation statements)

References 36 publications

(43 reference statements)

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“…The new door to the ultra-cold atom quantum system is thus opened, which creates many new possibilities for observing and analyzing quantum phenomena at the macro level. The SOC-BECs effect also shows many interesting localization phenomena, such as solitons, [5][6][7][8][9] band gap solitons [10][11][12] and vortex structures. [13,14] The concept of the 𝒫𝒯 periodic potential firstly appeared in the study of quantum operators and their spectra.…”

Section: Introductionmentioning

confidence: 99%

Gap solitons of spin–orbit-coupled Bose–Einstein condensates in PT periodic potential

Wang¹,

Liu²,

Xu³

2022

Chinese Phys. B

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We numerically investigate the gap solitons in Bose-Einstein condensates (BECs) with spin-orbit coupling (SOC) in the parity-time ($\mathcal{PT}$)-symmetric periodic potential. We find that the depths and periods of the imaginary lattice have an important influence on the shape and stability of these single-peak gap solitons and double-peak gap solitons in the first band gap. The dynamics of these gap solitons are checked by the split-time-step Crank-Nicolson method. It is proved that the depths of the imaginary part of the $\mathcal{PT}$-symmetric periodic potential gradually increase, and the gap solitons become unstable. But the different periods of imaginary part hardly affect the stability of the gap solitons in the corresponding parameter interval.

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Section: Introductionmentioning

confidence: 99%

Gap solitons of spin–orbit-coupled Bose–Einstein condensates in PT periodic potential

Wang¹,

Liu²,

Xu³

2022

Chinese Phys. B

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“…[15,39] Moreover, the dynamics of moving bright solitons in a polarized BEC with spin-orbit coupling has been studied, showing that the speed of a soliton dominates its structure. [40] Both stationary bright solitons and moving bright solitons can be found in a spinorbit-coupled condensate. [41] In contrast to bright solitons, reflection of a dark matter-wave soliton has not yet been well investigated, particularly in its structure.…”

Section: Introductionmentioning

confidence: 99%

Quantum reflection of a Bose–Einstein condensate with a dark soliton from a step potential*

Wang¹,

Xing²,

Du³

et al. 2021

Chinese Phys. B

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We study dynamical behaviors of a Bose–Einstein condensate (BEC) containing a dark soliton reflected from potential wells and potential barriers, respectively. The orientation angle of the dark soliton and the width of the potential change play key roles on the reflection probability R s. Variation of the reflection probability with respect to the orientation angle θ of the dark soliton can be well described by a cosine function R s ∼ cos [λ(θ – π/2)], where λ is a parameter determined by the width of the potential change. There are two characteristic lengths which determine the reflection properties. The dependence of the reflection probability on the width of the potential change shows distinct characters for potential wells and potential barriers. The length of the dark soliton determines the sensitiv width of potential wells, whereas for potential barriers, the decay length of the matter wave in the region of the barrier qualifies the sensitive width of the barrier. The time evolution of the density profiles of the system during the reflection process is studied to disclose the different behaviors of matter waves in the region of the potential variation.

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“…[7] Various ground-state structures and dynamic properties are presented in the two-component BEC system. [8][9][10][11] Recently, the dipolar BECs with large magnetic moment atomic species have been realized successfully in practical experiments. [12][13][14][15] Different from the isotropic contact interaction, the dipole-dipole interaction (DDI) is anisotropy, and not only attractive but also repulsive, relying on the angle θ between the polarization axis and the vector 𝑟 between the two dipoles.…”

Section: Introductionmentioning

confidence: 99%

Ground-state vortex structures of a rotating binary dipolar Bose–Einstein condensate confined in harmonic plus quartic potential

et al. 2019

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We consider a binary dipolar Bose-Einstein condensate confined in a rotating harmonic plus quartic potential trap. The ground-state vortex structures are numerically obtained as a function of the contact interactions and the dipole-dipole interaction in both slow and rapid rotation cases. The results show that the vortex configurations depend strongly on the strength of the contact interactions, the relative strength between dipolar and contact interactions, as well as on the orientation of the dipoles. A variety of exotic ground-state vortex structures, such as pentagonal and hexagon vortex lattice, square vortex lattice with a central vortex, annular vortex lines, and straight vortex lines, are observed by turning such controllable parameters. Our results deepen the understanding of effects of dipole-dipole interaction on the topological defects.

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Moving bright solitons in a pseudo-spin polarization Bose–Einstein condensate

Cited by 9 publications

References 36 publications

Gap solitons of spin–orbit-coupled Bose–Einstein condensates in PT periodic potential

Gap solitons of spin–orbit-coupled Bose–Einstein condensates in PT periodic potential

Quantum reflection of a Bose–Einstein condensate with a dark soliton from a step potential*

Ground-state vortex structures of a rotating binary dipolar Bose–Einstein condensate confined in harmonic plus quartic potential

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