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Non-equilibrium performance of a Dzyaloshinskii–Moriya -coupled two-spin quantum stirling engine under squeezed reservoirs

Author

Listed:
  • Zhu, Zhengtong
  • Zhang, Heshuai
  • Wei, Bowen

Abstract

A quantum Stirling heat engine employing a two-particle Heisenberg working substance with Dzyaloshinskii–Moriya (DM) interaction is analyzed under the influence of two squeezed thermal reservoirs. Key parameters—namely the squeezing strengths, the antisymmetric exchange, and the working parameter ratio—are systematically varied to assess their impact on thermodynamic properties including the effective temperatures, individual heat exchanges, total work output, and cycle efficiency. Heat flows exhibit nonmonotonic dependence on D and squeezing—resonance windows enhance energy exchange when transition frequencies align with reservoir sidebands, while detuning at larger D reduces coupling. The work output peaks at moderate squeezing asymmetry before vanishing at symmetry and is diminished by increasing D but substantially boosted by larger the ratio between working parameters. Efficiency achieves its maximum at low squeezing ratios and is degraded by both DM coupling and excessive squeezing symmetry, though coupling asymmetry partly restores performance.

Suggested Citation

  • Zhu, Zhengtong & Zhang, Heshuai & Wei, Bowen, 2026. "Non-equilibrium performance of a Dzyaloshinskii–Moriya -coupled two-spin quantum stirling engine under squeezed reservoirs," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 682(C).
    • Handle: RePEc:eee:phsmap:v:682:y:2026:i:c:s0378437125007885
    DOI: 10.1016/j.physa.2025.131136
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    References listed on IDEAS

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    1. J.-W. Zhang & J.-Q. Zhang & G.-Y. Ding & J.-C. Li & J.-T. Bu & B. Wang & L.-L. Yan & S.-L. Su & L. Chen & F. Nori & Ş. K. Özdemir & F. Zhou & H. Jing & M. Feng, 2022. "Dynamical control of quantum heat engines using exceptional points," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Vijayan, Vipin & Chotorlishvili, L. & Ernst, A. & Katsnelson, M.I. & Parkin, S.S.P. & Mishra, Sunil K., 2025. "Quantum heat engine with near-zero irreversible work utilizing quantum skyrmion working substance," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 669(C).
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