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Enhanced tripartite interaction in a magnon-Andreev-superconducting qubit hybrid system: Collapse-revival phenomena and entanglement redistribution

Sheng Zhao and Peng-Bo Li*

  • Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi’an 710049, China

  • *Contact author: lipengbo@mail.xjtu.edu.cn
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Phys. Rev. Research 8, 033074 – Published 17 July, 2026

DOI: https://doi.org/10.1103/mqz1-99xc

Abstract

Tripartite interactions are fundamental for realizing quantum phenomena beyond pairwise physics, yet their native implementation—particularly among distinct quantum systems—remains challenging. Here, we propose a hybrid quantum architecture comprising a magnonic mode [in a yttrium iron garnet (YIG) sphere], an Andreev spin qubit, and a superconducting qubit, to realize a native and strong interaction rather than relying on synthesis from two-body processes, leveraging the coupling between the spin-dependent supercurrent and the magnetic field of YIG sphere. Through analytical and numerical studies, we demonstrate that this interaction induces synchronized collapse and revival in qubit populations when the magnon is initially prepared in a coherent state. Notably, during the collapse region—where populations remain static—the entanglement structure undergoes a dramatic and continuous reorganization. We show that the genuine tripartite entanglement is redistributed into bipartite entanglement between the two qubits, and vice versa, with the total entanglement conserved. These phenomena, unattainable via bipartite couplings, underscore the potential of tripartite interactions for exploring intrinsically new quantum effects and advancing hybrid quantum information platforms.

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Phys. Rev. Research 8, 033074– Published 17 July, 2026
  • Received 12 January 2026
  • Accepted 24 June 2026
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