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    Skyrmionic Schrödinger cat states in monoaxial chiral magnets

    Štefan Liščák*,†, Andreas Haller†, Andreas Michels, Thomas L. Schmidt, and Vladyslav M. Kuchkin

    • *Contact author: stefan.liscak@uni.lu
    • †These authors contributed equally to this work.

    Phys. Rev. B 113, 174403 – Published 12 May, 2026

    DOI: https://doi.org/10.1103/842q-ghyt

    Abstract

    We study the low-energy excitation spectra of a spin-1/2 quantum Heisenberg model with a monoaxial Dzyaloshinskii-Moriya interaction. Using the density matrix renormalization group method, our analysis reveals a degeneracy between skyrmion and antiskyrmion states, enabling the formation of a Schrödinger cat state, a quantum superposition of these topologically distinct textures. To characterize this nontrivial state, we compute two-point spin correlation functions, highlighting signatures accessible via neutron scattering experiments. Furthermore, we demonstrate that applying a magnetic field gradient induces a coherent time evolution of the cat state, offering a controllable mechanism for its manipulation. These findings provide a framework for the detection of skyrmionic Schrödinger cat states in quantum magnets.

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