Magic Entropy in Hybrid Spin-Boson Systems

ORAL

Abstract

We introduce entropic measures to quantify non-classical resource in hybrid spin-boson systems. We discuss the stabilizer R´enyi entropy in the framework of phase space quantisation and define an analogous hybrid magic entropy and a mutual magic entropy that capture the distribution of quantum magic across spin and bosonic subsystems. We use these entropic measures to demonstrate two key phenomena: the detection of the superradiant phase transition in the Dicke model and the dynamics of magic in the Jaynes-Cummings model following a quench. We develop a Monte Carlo numerical scheme to enable practical computation in many-body examples.

*The work is supported by National Science and Technology Council of Taiwan under Grants No. NSTC 113-2112-M- 007-019, 114-2918-I-007-015. P.-Y.C acknowledges support from Yukawa Institute for Theoretical Physics, Kyoto University, RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences, and National Center for Theoretical Sciences, Physics Division. Computational resources were provided by Academia Sinica Grid Computing Centre, supported by Grant No. AS-CFII-112-103.

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Publication: Samuel Crew, Ying-Lin Li, Heng-Hsi Li, and Po-Yao Chang. Magic entropy in hybrid spin-boson systems. arXiv preprint arXiv:2508.06018, 2025.

Presenters

  • YingLin Li

    • National Tsing Hua University

Authors

  • YingLin Li

    • National Tsing Hua University

  • Samuel Crew

    • Department of Physics, National Tsing Hua University

  • Po-Yao Chang

    • National TsingHua University

  • Heng-Hsi Li

    • National Tsing Hua University, Department of Physics