Construction of a Spacetime Magnetic Hopfion

Spacetime magnetic hopfions from internal excitations and braiding of skyrmions

  • Ross Knapman
  • Timon Tausendpfund
  • Karin Everschor-Sitte
Article

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  • Understanding the mechanisms influencing the robustness of topologically protected states is of fundamental relevance. This experimental work demonstrates, through the observation of real-time longitudinal and transverse responses, the importance of transverse reconstruction of protected modes which is influenced by electron-electron interaction in addition to disorder.

    • Hoai Anh Ho
    • Jian Huang
    • K. W. West
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  • The antiferromagnetic spin 1/2 Kitaev model is known to have an intermediate phase under a magnetic field before transitioning to a fully polarized state. However, the nature of this phase for higher spins remained unclear. This paper explores the quantum phase diagram of the antiferromagnetic Kitaev honeycomb model in a magnetic field using tensor-network methods and high-order linked cluster expansions, uncovering an intermediate phase with distinct local magnetization patterns across different spin values.

    • Saeed S. Jahromi
    • Max Hörmann
    • Kai Phillip Schmidt
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  • Due to its proximity to the Sun, the space plasma environment of Mercury is tightly coupled with the interior and the surface of the planet, and their interaction facilitate the escape of planetary material and energy exchange. The authors present data from the third flyby of the BepiColombo spacecraft revealing new evidence of trapped energetic hydrogen (H+) with energies of around 20 keV/e and highlight the presence of cold ion population below 50 eV/e in Mercury’s magnetosphere.

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    • Shoya Matsuda
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  • Manipulation of materials properties by laser driving can lead to future technological applications, but a complete picture of its mechanisms is missing. In their paper, authors propose a method based on ultrafast x-ray diffraction that allows for resolving laser-driven electron dynamics on their natural time and length scales.

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    • Robin Santra
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  • Edge-magnetoplasmon interferometers have been proposed as a tool to investigate anyonic properties of quasiparticles in the regime of the Fractional Quantum Hall effect. In this work, the authors demonstrate the possibility to control electrostatically the resonance frequency of EMP resonators of micrometric size and explain the role of gates, paving the way toward the realization of anyonic interferometers.

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    • Giacomo Rebora
    • Gerbold C. Ménard
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  • The authors introduce a hybrid quantum-classical algorithm for photonic quantum computing that focuses on tackling continuous-variable optimization problems using fewer quantum operations than existing methods. The approach shows better performance and practical implementation potential, demonstrated on Xanadu’s quantum chip.

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    • Koushik Paul
    • Xi Chen
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  • The reversal of spin chirality in the absence of any externally applied field would substantially broaden the use of chiral magnets for applications in spintronic devices. In this manuscript the authors demonstrate the spontaneous reversal of spin chirality in the topological magnet EuAl4 using resonant elastic x-ray scattering.

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    • Dmitry D. Khalyavin
    • Alessandro Bombardi
    ArticleOpen Access
  • Enhancing deformation of soft microparticles such as cells, capsules and vesicles has widespread applications in cell phenotyping, drug/gene delivery and smart material synthesis. Here, the authors demonstrate that enclosing a capsule into a droplet can amplify the capsule deformation parameter by up to two orders of magnitude, compared with an isolated capsule experiencing identical channel flow conditions.

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    • Ruixin Lu
    • Yi Sui
    ArticleOpen Access
  • Asteroid tracking has been demonstrated as a promising and prominent probe of fifth forces arising in several well-motivated models beyond the Standard Model of particle physics. The authors use the state-of-art tracking data for the asteroid Bennu from the OSIRIS-REx mission to derive the tightest limits on fifth forces and ultralight dark matter at the lengths of solar-system objects.

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    • Davide Farnocchia
    • Luca Visinelli
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