Energy barriers for vortex nucleation in dipolar condensates

Abad, M.; Guilleumas, M.; Mayol, R.; Pí, M.; Jezek, D. M.

doi:10.1134/s1054660x1009001x

Cited by 5 publications

(4 citation statements)

References 31 publications

(65 reference statements)

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“…It is found that dipolar interactions increase v Ω in prolate traps and lower it in oblate traps when compared to the pure s-wave case [161,162]. Intuitively, this makes sense because in the prolate case dipolar interactions tend to reduce R ⊥ but in the oblate case they increase it.…”

Section: Vortex In a Trapped Dipolar Bose-einstein Condensate In The mentioning

confidence: 99%

Vortices and vortex lattices in quantum ferrofluids

Martin

Marchant

O’Dell

et al. 2017

J. Phys.: Condens. Matter

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The experimental realization of quantum-degenerate Bose gases made of atoms with sizeable magnetic dipole moments has created a new type of fluid, known as a quantum ferrofluid, which combines the extraordinary properties of superfluidity and ferrofluidity. A hallmark of superfluids is that they are constrained to rotate through vortices with quantized circulation. In quantum ferrofluids the long-range dipolar interactions add new ingredients by inducing magnetostriction and instabilities, and also affect the structural properties of vortices and vortex lattices. Here we give a review of the theory of vortices in dipolar Bose-Einstein condensates, exploring the interplay of magnetism with vorticity and contrasting this with the established behaviour in non-dipolar condensates. We cover single vortex solutions, including structure, energy and stability, vortex pairs, including interactions and dynamics, and also vortex lattices. Our discussion is founded on the mean-field theory provided by the dipolar Gross-Pitaevskii equation, ranging from analytic treatments based on the Thomas-Fermi (hydrodynamic) and variational approaches to full numerical simulations. Routes for generating vortices in dipolar condensates are discussed, with particular attention paid to rotating condensates, where surface instabilities drive the nucleation of vortices, and lead to the emergence of rich and varied vortex lattice structures. We also present an outlook, including potential extensions to degenerate Fermi gases, quantum Hall physics, toroidal systems and the Berezinskii-Kosterlitz-Thouless transition.

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Section: Vortex In a Trapped Dipolar Bose-einstein Condensate In The mentioning

confidence: 99%

Vortices and vortex lattices in quantum ferrofluids

Martin

Marchant

O’Dell

et al. 2017

J. Phys.: Condens. Matter

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“…(A.4) and (A.5) of Appendix A, respectively. R T F (0) is related to root mean square radius r rms by R T F (0) = √ 3r rms [43,44].…”

Section: Root Mean Square Radius Of the Condensatementioning

confidence: 99%

Parametric Triggering of Vortices in Toroidally Trapped Rotating Bose-Einstein Condensates

Arivazhagan,

Muruganandam,

Nallamanian

2022

SSRN Journal

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“…Here we use R ρ (0) = R TF (0)/ √ 3 [43]. The above relation (10) is used to study the vortex number in conventional BECs in a rotating deep optical lattice [44].…”

Section: Vortices In a Pure Dipolar Becmentioning

confidence: 99%

Vortex dynamics of rotating dipolar Bose–Einstein condensates

Kumar¹,

Muruganandam²

2012

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

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Abstract.We study the influence of dipole-dipole interaction on the formation of vortices in a rotating dipolar Bose-Einstein condensate (BEC) of 52 Cr and 164 Dy atoms in quasi two-dimensional geometry. By numerically solving the corresponding time-dependent mean-field Gross-Pitaevskii equation, we show that the dipolar interaction enhances the number of vortices while a repulsive contact interaction increases the stability of the vortices. Further, an ordered vortex lattice of relatively large number of vortices is found in a strongly dipolar BEC.

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Energy barriers for vortex nucleation in dipolar condensates

Cited by 5 publications

References 31 publications

Vortices and vortex lattices in quantum ferrofluids

Vortices and vortex lattices in quantum ferrofluids

Parametric Triggering of Vortices in Toroidally Trapped Rotating Bose-Einstein Condensates

Vortex dynamics of rotating dipolar Bose–Einstein condensates

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