Coupled spin-vortex pair in dipolar spinor Bose-Einstein condensates

Li, Tiantian; Yi, Su; Zhang, Yunbo

doi:10.1103/physreva.92.063603

Cited by 8 publications

(10 citation statements)

References 50 publications

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“…Detailed consideration of interactions between the fluxons in a regime of strong ring-ring coupling may be a relevant extension of the present work. Another relevant direction for the continuation of the analysis may be consideration of two-layer settings for spinor (twocomponent) condensates [49,50].…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Tunneling of persistent currents in coupled ring-shaped Bose–Einstein condensates

Oliinyk

Yakimenko

Malomed

2019

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

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Considerable progress in experimental studies of atomic gases in a toroidal geometry opens up novel prospects for the investigation of fundamental properties of superfluid states and creation of new configurations for atomtronic circuits. In particular, a setting with Bose-Einstein condensates loaded in a dual-ring trap suggests a possibility to consider the dynamics of tunneling between condensates with different angular momenta. Accordingly, we address the tunneling in a pair of coaxial three-dimensional (3D) ring-shaped condensates separated by a horizontal potential barrier. A truncated (finite-mode) Galerkin model and direct simulations of the underlying 3D Gross-Pitaevskii equation are used for the analysis of tunneling superflows driven by an initial imbalance in atomic populations of the rings. The superflows through the corresponding Bose-Josephson junction are strongly affected by persistent currents in the parallel rings. Josephson oscillations of the population imbalance and angular momenta in the rings are obtained for co-rotating states and non-rotating ones. On the other hand, the azimuthal structure of the tunneling flow demonstrates formation of Josephson vortices (fluxons) with zero net current through the junction for hybrid states, built of counter-rotating persistent currents in the coupled rings.PACS numbers:

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Section: Conclusion and Discussionmentioning

confidence: 99%

Tunneling of persistent currents in coupled ring-shaped Bose–Einstein condensates

Oliinyk

Yakimenko

Malomed

2019

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

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“…In a two-dimensional (2D) SO-coupled dipolar BEC with repulsive contact interactions, two types of solitons have been found [10]. In a dipolar spin-1 BEC trapped in a double-well potential the ground state, the magnetic properties and the collisional and magnetic field quench dynamics of coupled spin-vortex pairs are investigated [11]. A spin-1 BEC with Rashba SO and dipolar interactions confined in a cigar-shaped trap exhibits a rich variety of ground state spin structures, including twisted spin vortices [12].…”

Section: Introductionmentioning

confidence: 99%

Quasi-one-dimensional spin-orbit- and Rabi-coupled bright dipolar Bose-Einstein-condensate solitons

Chiquillo

2018

Phys. Rev. A

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We study the formation of stable bright solitons in quasi-one-dimensional (quasi-1D) spin-orbit-(SO-) and Rabi-coupled two pseudospinor dipolar Bose-Einstein-condensates (BECs) of 164 Dy atoms in the presence of repulsive contact interactions. As a result of the combined attraction-repulsion effect of both interactions and the addition of SO and Rabi couplings, two kinds of ground states in the form of self-trapped bright solitons can be formed, a plane-wave soliton (PWS) and a stripe soliton (SS). These quasi-1D solitons cannot exist in a condensate with purely repulsive contact interactions and SO and Rabi couplings (no dipole). Neglecting the repulsive contact interactions, our findings also show the possibility of creating PWSs and SSs. When the strengths of the two interactions are close to each other, the SS develops an oscillatory instability indicating a possibility of a breather solution, eventually leading to its destruction. We also obtain a phase diagram showing regions where the solution is a PWS or a SS.

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“…The majority of researches in many-body system involved trapped spinor atoms such as 23 Na and 87 Rb experimentally realized in many cold atom labs [10][11][12][13][14][15]. Among these, spin s = 1 system plays a central role in the fundamental understanding of topological quantum phase transition of condensed materials and in modern technologies including, for instance, data storage [16], spin currents [17], spin vortex [6,18], etc. In low-dimensional system, owing to the liberation of the spin degrees of freedom, a major focus is the understanding of quantum magnetism of higher spin, which have their origin in the underlying microscopic processes between elementary spins.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy and spin dynamics for strongly interacting few-spinor bosons in one-dimensional traps

2017

Self Cite

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We consider a one-dimensional trapped gas of strongly interacting few spin-1 atoms which can be described by an effective spin chain Hamiltonian. Away from the SU (3) integrable point, where the energy spectrum is highly degenerate, the rules of ordering and crossing of the energy levels and the symmetry of the eigenstates in the regime of large but finite repulsion have been elucidated. We study the spin-mixing dynamics which is shown to be very sensitive to the ratio between the two channel interactions g0/g2 and the effective spin chain transfers the quantum states more perfectly than the Heisenberg bilinear-biquadratic spin chain.

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Coupled spin-vortex pair in dipolar spinor Bose-Einstein condensates

Cited by 8 publications

References 50 publications

Tunneling of persistent currents in coupled ring-shaped Bose–Einstein condensates

Tunneling of persistent currents in coupled ring-shaped Bose–Einstein condensates

Quasi-one-dimensional spin-orbit- and Rabi-coupled bright dipolar Bose-Einstein-condensate solitons

Spectroscopy and spin dynamics for strongly interacting few-spinor bosons in one-dimensional traps

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