Skyrmion-based magnetic traps for ultracold atoms

Qin, Ren; Wang, Y.

doi:10.1103/physreva.101.053428

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…In the past few decades, cold atoms and molecules have been tamed by inhomogeneous magnetic field in various ways, such as Zeeman decelerator [1][2][3][4], magnetic guide [5,6], magnetic mirror [7], magnetic storage ring [8], magnetic conveyor belt [9,10], magnetic beam splitter [11][12][13][14], atomic interferometer [15][16][17], magnetic trap [18][19][20][21][22][23], and so on. Most magnetic traps are designed for atoms and molecules in weak-field-seeking states which are not the lowest-energy configurations.…”

Section: Introductionmentioning

confidence: 99%

AC magnetic trap for cold paramagnetic molecules

Li,

Lin,

Zhang

et al. 2023

Commun. Theor. Phys.

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Strong-field-seeking states are the lowest-energy configurations for paramagnetic molecules in the magnetic field. Molecules in strong-field-seeking states cannot be trapped in a magnetostatic field because a magnetostatic maximum in free space is not allowed. In this paper, we propose an AC magnetic trap composed of two pairs of Helmholtz coils. The spatial magnetic field distribution is numerically calculated and the time-sequential control is depicted. We investigate the influence of the switching frequency and the electric current in the coils on the performance of our trap. Variations of the location and phase-space distribution during a whole switching cycle are simulated. Finally, we study the impact of time during which the field is switched off on the number of captured molecules in a switching cycle.

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Section: Introductionmentioning

confidence: 99%

AC magnetic trap for cold paramagnetic molecules

Li,

Lin,

Zhang

et al. 2023

Commun. Theor. Phys.

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Bloch point nanospheres for the design of magnetic traps

Tejo,

Zambrano-Rabanal,

Carvalho-Santos

et al. 2023

Applied Physics Letters

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Through micromagnetic simulations, this work analyzes the possibility of using an array of magnetic nanospheres hosting Bloch points (BPs) to compose a system with the features of a magnetic trap (MT). We show that a BP can be nucleated as a metastable configuration in a wide range of the nanosphere radius compared to a quasi-uniform and vortex state. We also show that the stabilized BP generates a quadrupolar magnetic field outside the nanosphere. Based on this fact, we analyze the field profile of different arrays of these nanospheres, showing that the obtained magnetic field profiles share the needed features to compose MTs. Some highlights of using an array of Bloch point nanospheres in MTs rely on the magnetic field gradients achieved, which are orders of magnitude higher than similar standard systems, and allow three-dimensional trapping. Our results could be useful in trapping particles through the intrinsic magnetization of ferromagnetic nanoparticles while avoiding the commonly used mechanisms associated with Joule heating.

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Skyrmion-based magnetic traps for ultracold atoms

Cited by 2 publications

References 27 publications

AC magnetic trap for cold paramagnetic molecules

AC magnetic trap for cold paramagnetic molecules

Bloch point nanospheres for the design of magnetic traps

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