Controlled creation and decay of singly-quantized vortices in a polar magnetic phase

Xiao, Yao; Borgh, Magnus O.; Weiss, Lauren; Blinova, Alina; Ruostekoski, Janne; Hall, D. S.

doi:10.1038/s42005-021-00554-y

Cited by 11 publications

(5 citation statements)

References 63 publications

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“…One straight would be to extend present work in the presence of finite temperature [89]. Extending the present work to the threedimensional setup and exploring the corresponding nonlinear defect formations would be equally interesting [38,90,91]. Another vital prospect would be to employ dipolar BEC to inspect the impact of the long-range interaction [92].…”

Section: Discussionmentioning

confidence: 99%

Vortex formation and quantum turbulence with rotating paddle potentials in a two-dimensional binary Bose-Einstein condensate

Das¹,

Mukherjee²,

Majumder³

2022

Preprint

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Motivated by the recent observation of a gigantic vortex cluster in a two-dimensional Bose-Einstein condensate [Science 364, 1264[Science 364, (2019], we conduct a theoretical study of the creation and dynamics of vortices in a binary Bose-Einstein condensate with a mass imbalance between the species. To initiate the dynamics, we use one or two rotating paddle potentials in one species, while the other species is influenced only via the interspecies interaction. In both species, the number as well as the dominant sign of the vortices are determined by the rotation frequency of the paddle potential. Clusters of positive and negative vortices form at low rotation frequency comparable to that of the trap when using the single paddle potential. In contrast, vortices of the same sign tend to dominate as rotation frequency increases. When the rotation frequency is sufficiently high, the rapid annihilation of vortex-antivortex pairs significantly reduces the number of vortices in the system. For two paddle potentials rotating in the same direction, the vortex dynamics phenomenon is similar to that of a single paddle. However, when the paddle potentials are rotated in the opposite direction, both positive and negative signed vortices occur at all rotational frequencies. At low rotational frequencies, the cluster of like-signed vortices produces the k −5/3 and k −3 power laws in the incompressible kinetic energy spectrum at low and high wavenumbers, respectively, a hallmark property of the quantum turbulent flows.

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Section: Discussionmentioning

confidence: 99%

Vortex formation and quantum turbulence with rotating paddle potentials in a two-dimensional binary Bose-Einstein condensate

Das¹,

Mukherjee²,

Majumder³

2022

Preprint

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show abstract

“…This wavefunction is invariant under the coupled transformation of the spin-rotation angle φ ¼ λϕ and external phase φ = j λ ϕ as ðφ; φÞ7 !ðφ À π; φ þ πÞ. This symmetry is a signature of halfquantum vortices that have been observed in superconductors 48,49 , superfluid 3 He 50 , and atomic BECs 51,52 .…”

mentioning

confidence: 81%

Topological atom optics and beyond with knotted quantum wavefunctions

Jayaseelan,

Murphree,

Schultz

et al. 2024

Commun Phys

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Atom optics demonstrates optical phenomena with coherent matter waves, providing a foundational connection between light and matter. Significant advances in optics have followed the realization of structured light fields hosting complex singularities and topologically non-trivial characteristics. However, analogous studies are still in their infancy in the field of atom optics. Here, we investigate and experimentally create knotted quantum wavefunctions in spinor Bose–Einstein condensates which display non-trivial topologies. In our work we construct coordinated orbital and spin rotations of the atomic wavefunction, engineering a variety of discrete symmetries in the combined spin and orbital degrees of freedom. The structured wavefunctions that we create map to the surface of a torus to form torus knots, Möbius strips, and a twice-linked Solomon’s knot. In this paper we demonstrate close connections between the symmetries and underlying topologies of multicomponent atomic systems and of vector optical fields—a realization of topological atom-optics.

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“…1g), octahedral (F ≥ 3), and icosahedral (F ≥ 6) Majorana symmetries. Previous experimental studies have examined phenomena associated with spinor BECs in simple magnetic phases that lack such symmetries, including topological defects [11][12][13][14] and textures [15][16][17][18], spontaneous pattern formation [19,20], dipolar interactions [21], magnons [22], and condensate fragmentation [23]. However, apart from early experiments on spin population dynamics [24], magnetic phases with discrete polytope symmetries remain unexplored.…”

Section: Introductionmentioning

confidence: 99%

Topological Superfluid Defects with Discrete Point Group Symmetries

Xiao,

Borgh,

Blinova

et al. 2022

Preprint

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Discrete symmetries are spatially ubiquitous but are often hidden in internal states of systems where they can have especially profound consequences. In this work we create and verify exotic magnetic phases of atomic spinor Bose-Einstein condensates that, despite their continuous character and intrinsic spatial isotropy, exhibit complex discrete polytope symmetries in their topological defects. Using carefully tailored spinor rotations and microwave transitions, we engineer singular line defects whose quantization conditions, exchange statistics, and dynamics are fundamentally determined by these underlying symmetries. We show how filling the vortex line singularities with atoms in a variety of different phases leads to core structures that possess magnetic interfaces with rich combinations of discrete and continuous symmetries. Such defects, with their non-commutative properties, could provide unconventional realizations of quantum information and interferometry.

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Controlled creation and decay of singly-quantized vortices in a polar magnetic phase

Cited by 11 publications

References 63 publications

Vortex formation and quantum turbulence with rotating paddle potentials in a two-dimensional binary Bose-Einstein condensate

Vortex formation and quantum turbulence with rotating paddle potentials in a two-dimensional binary Bose-Einstein condensate

Topological atom optics and beyond with knotted quantum wavefunctions

Topological Superfluid Defects with Discrete Point Group Symmetries

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